SummaryIntense, sustained nursing lengthens inter-birth intervals and is causally linked with low natural fertility. However, in traditional settings, the effects of such nursing on fertility are difficult to disentangle from those of nutrition. Results from an prospective, direct observational study of reproductive function in well-nourished Amele women who nurse intensively and persistently but who also have high fertility are here presented. Endocrine measures show that ovarian activity resumes by median 11·0 months postpartum. Median duration of postpartum amenorrhoea is 11·3 months, (...) time to next conception is 19·0 months, and the inter-birth interval is 28·0 months. Average life time fertility is 6·8. High fertility in Amele women is due both to refractoriness of reproductive function to suckling stimuli, and to maintenance of equivalent age-specific fertility rates across the reproductive life span. (shrink)

This paper examines critically Kretzmann's reconstruction of the project of natural theology as exemplified by Aquinas's Summa Contra Gentiles. It is argued that the notion of natural theology, as understood and advocated by Kretzmann, is particularly indebted to the epistemologically biased natural theology of modernity with its focus on rational justification of theistic belief. As a consequence, Kretzmann's view of the arguments for the existence of God and their place within Aquinas's theological project is insufficiently sensitive to the ontological conception (...) of truth and intelligibility which underlies the argumentation. From his epistemological point of view Kretzmann differs from Aquinas in two aspects. First, he contends that it is not necessary to establish the existence of God with absolute certainty at the outset; one may begin with the hypothesis that there is a God. Second, the arguments do not yet conclude to the existence of God in the specific theistic sense; they show at most the existence of a primary explanatory entity, which may be identified with God later on. Both claims are criticized in the light of a discussion of Aquinas's theological method. (shrink)

According to Thomas Aquinas, both logic and metaphysics are characterized by the same universal scope. The consideration of metaphysics extends to everthing which is, as its subject is being insofar as it is being. And the science of logic too considers everything which is, not as it exists in reality but insofar as the whole of being falls under the consideration of reason. Because of the equivalence between the logical sphere of reason and the real sphere of being metaphysics has (...) an affinity with logic. This similarity is mentioned by Aquinas in order to explain the legitimate use of a logical mode of reasoning within metaphysics. Metaphysics is not identical with logic, but the modus logicus, the logical mode of reasoning, is to a certain extent useful for the philosopher in his inquiry into metaphysical matters. In his Commentary on Aristotle’s Metaphysics Thomas refers frequently to this ‘modus logicus' by which Aristotle is said to proceed in his investigation into substance. However, it is not altogether clear what this method consists in and how the similarity between logic and metaphysics, on which the modus logicus is based, should be understood. In this article I want to clarify the meaning of the modus logicusin Aquinas and its revelance for metaphysics. This might help us to understand better how according to Thomas logic and metaphysics are related to one another and in what sense they are different. (shrink)

This book offers a philosophical analysis of the main themes and problems of Aquinas' metaphysics of creation, centred on the concept of participation, the systematical meaning of which is examined in a critical discussion of the prevailing views of contemporary Thomas scholars.

The results of an empirical study intoperceptions of the treatment of farm animals inthe Netherlands are presented. A qualitativeapproach, based on in-depth interviews withmeat livestock farmers and consumers was chosenin order to assess motivations behindperceptions and to gain insight into the waypeople deal with possible discrepancies betweentheir perceptions and their daily practices.Perceptions are analyzed with the help of aframe of reference, which consists ofvalues, norms, convictions, interests, andknowledge.

Amsterdam University Press is a leading publisher of academic books, journals and textbooks in the Humanities and Social Sciences. Our aim is to make current research available to scholars, students, innovators, and the general public. AUP stands for scholarly excellence, global presence, and engagement with the international academic community.

This article examines how Reformed scholasticism can be relevant for systematic theology today. ‘Reformed Scholasticism’ denotes the academic practice in which the doctrines of the Reformation are expounded, explained, and defended. It is primarily a method and attitude in search of the truth, based on a careful reading of Scripture, drawing on patristic and medieval traditions, and interacting with philosophy and other academic disciplines. In addition to these methodological features, important contributions on various doctrinal topics can be discovered. The doctrine (...) of God has a foundational role in the sense that God is the primary subject of the other topics. Reformed scholastic theology not only examines God’s inner essence, but also the concrete relation and operation of God toward his world. In a Trinitarian understanding of God’s essence, a distinction is maintained between God’s immanent relatedness as three divine Persons, and his outward relation to created reality. The doctrines of creation and providence gave occasion for Reformed scholastics to engage in debates with the emerging natural sciences, and also articulated important theological insights concerning the involvement of God in creaturely affairs. In Christology, the Reformed orthodox maintained the classic doctrine of the two natures of Jesus Christ, against Socinians and other opponents. These ontological statements are the necessary conditions for a proper understanding of the salvation by Christ. While the doctrinal positions of Reformed scholastic theology cannot be automatically transmitted to contemporary discussions, we can profit from this tradition on several levels of method and content. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Dei Filius I:On God, Creation, and ProvidenceRudi A. Te VeldeIn this essay, I want to share my impressions of the first chapter of the dogmatic constitution Dei Filius of Vatican I. It begins its declaration of the basic truths of Christian faith in a language which is similar, and probably intended to be similar, to that of a solemn confession of faith: "The holy, catholic, apostolic, and Roman church (...) believes and acknowledges that there is one true living God, creator and lord of heaven and earth."1 It reminds one, in some of its formulations, of the Nicene Creed, but with a remarkable difference: here, in the text of the constitution, the object of the confession is formulated as a proposition about God's existence.2 What is said is not, for example, "I believe in one God, the Father almighty"; but the Church believes and holds it to be true that there exists a God. One can notice a subtle shift from a confession of faith to the proclamation of a (rational) truth. The Pope, gathered with all the bishops of the Church, declares that there exists a God, the one and true living God, a doctrinal statement directed, by implication, against those who dare to deny the existence of God. The opening sentence of chapter 1 corresponds with its canon, which says that, "if anyone denies the one true God, creator and [End Page 823] lord of things visible and invisible: let him be anathema."3 Thus the constitution says that the "one, true living God" of the biblical faith exists, that this is a truth, and that, as consequence, the opposed thesis of atheism is false and must be rejected.Who is asserting this truth? Who is speaking and with which authority? The text leaves no doubt about the speaking subject. It is the Church, entitled to speak with authority about matters of faith, because it is the Roman Church, holy, catholic, and apostolic. The Church speaks, in the person of the pope, the legitimate successor of St. Peter, with authority granted to her by God himself through his Son Jesus Christ. In the preface preceding chapter 1 of the constitution, it is said that the Church is appointed by God to be "mother and mistress of nations." Hence:She can never cease from witnessing to the truth of God... and from declaring it, for she knows that these words were directed to her: "My spirit which is upon you, and my words I have put in your mouth, shall not depart out of your mouth from this time forth and for evermore"(Is 59:21).4This gives the pope, sitting in the chair of Peter, the authority of "teaching and defending Catholic truth and condemning erroneous doctrines."5 And the first thing to be declared, as part of the Church's task to proclaim the Catholic truth to all the nations, is to assert the existence of God against the error of atheism.It is important to understand the genre of a dogmatic constitution. It is a document in which the Church, by mouth of the pope together with the bishops, expounds the basic tenets of Christian teaching. The purpose of a dogmatic constitution is to reaffirm the basic truths of Christian doctrine, to clarify the fundamentals of faith in a message to the world. A constitution may be occasioned by actual developments in the world and society, but it speaks as it were from the standpoint of eternity. In case of the constitution Dei Filius, the addressee is the world of the mid-nineteenth century, a time of dominance of scientific reason, of materialism, naturalism, atheism, and not unimportantly, of current forms of idealistic pantheism (Georg Hegel, Friedrich Schelling, the influence of German Idealism in general); what the constitution especially stands opposed to [End Page 824] is the view of supernatural religion as being irrational. For this purpose it wants to reclaim reason and to overcome the disastrous gap between faith and (modern) rationality.The double program underlying the constitution—teaching the Catholic truth and condemning erroneous doctrines—reminds one of the Summa contra gentiles [SCG] of Thomas Aquinas.6 The... (shrink)

In this article the claim of the Dutch ‘Utrechtse School’ of philosophy of religion that its method of practising philosophical theology is a reprise of the Anselmian ‘faith in search of understanding’ is critically examined. Philosophical theology is conceived of by the adherents of this school as an analytical and argumentative clarification of the basic concepts of theistic belief from an insiders point of view. In contrast with the classical project of natural theology their aim is not to provide a (...) rational foundation of the truth of theism. The philosophical analysis of the main concepts of the theistic view of God departs from an methodological affirmation of their truth, that is, their reference to reality, as being an assumption made by faith. It is argued that this approach differs significantly from Anselm’s project of ‘faith in search of understanding’. Anselm aims at a rational understanding of the truth of what he believes. This means that the reference of faith to the reality of God does not remain an assumption of faith. Starting from faith and its inner desire to see the truth of God Anselm strives to reach after the reality of God by means of intellectual insight. In contrast with Anselm the ‘Utrechtse School’ views the truth claim of the statements of belief as a constitutive presupposition of a religious form of life. In my opinion this comes to saying that the believer must believe in the truth of what he believes as an implication of his religious behaviour and attitude. But this leaves no place any more for a seeking to understand the truth of what he believes. (shrink)

Amsterdam University Press is a leading publisher of academic books, journals and textbooks in the Humanities and Social Sciences. Our aim is to make current research available to scholars, students, innovators, and the general public. AUP stands for scholarly excellence, global presence, and engagement with the international academic community.

Metaphysics in discussion : the medieval context -- The degrees of abstraction and the metaphysical Separatio -- From physics to metaphysics : the way of Resolutio -- The transcendental focus of metaphysics -- The place of analogy in metaphysics -- From experience to transcendence -- The double challenge to metaphysics in the present-day world.

In The Doctrine of God Dolf te Velde examines the interaction of method and content in three historically important accounts of the doctrine of God.

The historiography of European liberalism has been dominated by large countries; this contribution focuses on the successful tradition of liberalism in the Netherlands. Just like German liberalism (but unlike the British 19th-century model), the spirit of Dutch 19th-century liberalism was constitutional (in the sense of being legal and juridical). It assumed that constitutional rules in a certain sense produced liberty, because liberty was not possible without a legally guaranteed context. Today the Dutch liberal party tries to combine classical liberalism with (...) a mild populism, but recently the Pim Fortuyn upsurge of populism has hurt the liberal party. A direct democratic style of politics has become popular among more right-wing liberals. Perhaps it is time to re-evaluate the 19th-century doctrinaire liberal traditions. Their anti-democratic ideas have been superseded, but the constitutional organization of liberty is as important as ever. (shrink)

Contemporary theology commonly rejects the traditional 'Greek' reading of Exodus 3:14, according to which God reveals himself to Moses by the name of 'being' in favour of a more religious interpretation which sees in the name a confirmation of Gods enduring and liberating presence to his people. By means of an interpretation of Thomas Aquinas' reading of the Exodus-name in the Summa the author intends to show that Aquinas' account of the name is not guided by an exegetical and hermeneutical (...) interest but by a propoer speculative way of questioning, which can be formulated as follows: given the fact that God reveals himself to Moses under the name of being, how can this name - in what it signifies and how it signifies - be understood as a suitable medium by which God reveals himself to man. In the Summa-text Thomas gives three arguments why the name 'being' is the most appropriate name of God. It is argued that each of these arguments relates to a different aspect of the complex structure of God-in-his-revelation-to-man. Aquinas' account of the name of being is in accord with his analysis of the divine names, in which the tension between the res significata, the reality which is signified by a name, and the modus significandi, the human way of signifying, stands central. This tension returns in his analysis of the name 'being', where it clarifies the structure of revelation as a concealing presence of God to man. The implications of Thomas' reading for the notion of revelation exhibit some interesting similarities with the modern reading of Exodus inspite of the fundamental difference in theological method. (shrink)

What is the future of Philosophy of education? Or as many of scholars and thinkers in this final ‘future-focused’ collective piece from the philosophy of education in a new key Series put it, what are the futures—plural and multiple—of the intersections of ‘philosophy’ and ‘education?’ What is ‘Philosophy’; and what is ‘Education’, and what role may ‘enquiry’ play? Is the future of education and philosophy embracing—or at least taking seriously—and thinking with Indigenous ethicoontoepistemologies? And, perhaps most importantly, what is that (...) ‘Future’? These debates have been located in the work of diverse scholars: from the West, from Global South, from indigenous thinkers. In this collective piece, we purposefully juxtapose diverse takes on the future of these intersections. We have given up the urge to organise, place together, separate with subheadings or connect the paragraphs that follow. Instead, we let these philosophers of education and thinkers who use philosophical texts and ideas to sit together in one long read as potentially ‘strange and unusual bedfellows’. This text urges us to understand how these scholars and thinkers perceive our educational philosophical futures, and how the work and thinking they have done on thinking about what the future of that new key in philosophy of education may look like is embedded in a much deeper and richer literature, and personal experience. (shrink)

Vysokoškolská učebnice člení látku do tří oddílů (K obecným otázkám umění a literatury; Poetika; Geneze literárního díla a literární proces), v nichž se pokouší vyložit teorii literatury z jednotného hlediska a podat klíč kteoretickému objasnění všech literárních děl a řad.

In lieu of an abstract, here is a brief excerpt of the content:Reviewed by:Metaphysics between Experience and Transcendence: Thomas Aquinas on Metaphysics as a Science by Rudi A. te VeldeO.P. Philip-Neri ReeseVELDE, Rudi A. te. Metaphysics between Experience and Transcendence: Thomas Aquinas on Metaphysics as a Science. Münster: Aschendorff Verlag, 2021. vii + 246 pp. 38,00€In the opening chapter of Metaphysics 4, Aristotle states not only that there is a science of being as being and its per se properties but (...) also that it is the task of the metaphysician to investigate the principles and causes of such being. Does this mean that metaphysics comes in two parts—namely, an ontology that investigates being and its properties, followed by a theology that investigates the first principle of being? Or does it mean that the very investigation into being and its properties involves an investigation into the first principle of being—that is, that ontology in some sense is theology? The central purpose of Rudi A. te Velde's newest book is to show that, at least for Thomas Aquinas and those who would follow him, the answer is emphatically the latter: Thomistic metaphysics is essentially the resolutio, or tracing-back, of common being (ens commune) to divine being (ens divinum). This process of resolution situates Aquinas's metaphysics "between experience and transcendence." Unlike natural philosophy, metaphysics is not focused on reality as it is given to us in and through sensory experience. Unlike Christian theology, metaphysics is not focused on God as revealed to us in and through supernatural faith. Rather, it is focused on what both of these—experience and transcendence—presuppose, namely, the fundamental truth that all of reality comes from, and points back to, God as its principle and source. For te Velde, Aquinas's metaphysics is etiology or, as he puts it, "the science of presuppositions."Chapter 1 offers the reader a synoptic view of the basic outlines and contours of Aquinas's metaphysics, both positively and negatively. Positively, te Velde points out that Aquinas understands metaphysics to be an Aristotelian science, that is, a discipline unified around its subject. For the properties of a subject are what we aim to demonstrate when we engage in Aristotelian science, and its principles are what we appeal to when doing so. Negatively, te Velde contrasts Aquinas's view of metaphysics with that of his contemporary, Siger of Brabant, and that of our contemporary, John Haldane. Unlike the former, Aquinas's metaphysics takes common being, which is participated and created (and so does not include God), as its subject. Unlike the latter, Aquinas's [End Page 162] metaphysics is unified by the intelligibility of being in light of its principles.In chapters 2 through 5, te Velde focuses in on particular themes that are of central importance to Aquinas's account of metaphysics. Chapter 2 examines the role of separatio in distinguishing metaphysics from physics and mathematics. Where physics considers things that require matter both to be and to be understood, and mathematics considers things that require matter to be but not to be understood, metaphysics considers things that require matter neither to be nor to be understood. It does so by means of a judgment of separation—a judgment that something (for example, substance, form, and so on) can be without matter. Chapter 3 turns to the topic of resolutio, wherein the mind moves "from the concrete particular to its intelligible ground." Aquinas's metaphysics is marked by a twofold resolution: one in which being and its attributes are grasped as the intrinsic principles of all things, and a second in which God and separate substances are grasped as the extrinsic principles of all things. Chapter 4 then investigates the notion of transcendentality, which arises in the first of those two resolutive processes—for insofar as being and its attributes are common to all things, they are not limited to just one of the ten categories (that is, they are transcendental). Nevertheless, the way in which predicates like "one," "true," and "good" cut across the categories that divide common being is different from the way that they cut across the divide between God and creatures. This difference ushers in chapter 5's discussion... (shrink)

The parameters governing our behavior are in constant flux, and capturing these dynamics in cognitive models remains a challenge. We demonstrate how a mapping between ACT‐R's model of declarative memory and the linear ballistic accumulator enables efficient estimation of memory parameters from data. The resulting estimates provide a cognitively meaningful explanation for observed differences in behavior over time and between individuals.

The parameters governing our behavior are in constant flux. Accurately capturing these dynamics in cognitive models poses a challenge to modelers. Here, we demonstrate a mapping of ACT-R's declarative memory onto the linear ballistic accumulator (LBA), a mathematical model describing a competition between evidence accumulation processes. We show that this mapping provides a method for inferring individual ACT-R parameters without requiring the modeler to build and fit an entire ACT-R model. Existing parameter estimation methods for the LBA can be used, (...) instead of the computationally expensive parameter sweeps that are traditionally done. We conduct a parameter recovery study to confirm that the LBA can recover ACT-R parameters from simulated data. Then, as a proof of concept, we use the LBA to estimate ACT-R parameters from an empirical dataset. The resulting parameter estimates provide a cognitively meaningful explanation for observed differences in behavior over time and between individuals. In addition, we find that the mapping between ACT-R and LBA lends a more concrete interpretation to ACT-R's latency factor parameter, namely as a measure of response caution. This work contributes to a growing movement towards integrating formal modeling approaches in cognitive science. (shrink)

Lives and work of Veṅkaṭanātha (Vedantadesika), 1268-1369, and Maṇavāḷa Māmun̲i, 1370-1444, Vaishnavite leaders and exponents of the Viśiṣṭādvaita school in Hindu philosophy from Tamil Nadu.

Sociotype is a concept that allows a more comprehensive understanding about biosociology of undiagnosed rare diseases (URD). Sociotype is related to a genotype and a phenotype and it is an expression of the individual life world in society. In this paper, semiotic and hermeneutic analysis of papers published and selected about URD is developed. Te perspective followed in this research is aligned with the works of Barbieri and Peirce. Papers with the most social content have been selected and those with (...) a more biomedical content have been rejected. Te semiotics analysis has been divided in genotypic, phenotypic and sociotypic, and related to the hermeneutical perspective. It has been possible to understand the basis of semiotics elements of URD. Te general conclusion is that URD is a particular sociotype with a determined set of social characteristics. Tis paper opens research on the biosemiotic and hermeneutic perspective about URD. (shrink)

On Sikh doctrines inunciated by Guru Nanak.

Van Vugt, van der Velde, and collaborators show how cognitive architectures can implement verbal theories of psychiatric problems. They show how one theory of depressive rumination can be implemented in the ACT‐R cognitive architecture by changing the contents of its simulated memory. These manipulations of memory habits lead the model to show impairments in a sustained attention task‐‐a plausible impairment given that people who suffer from depression have concentration complaints.

John R. Searle argues that consciousness is a biological problem, and that the subjective feature of consciousness doesn’t exclude the scientific study thereof. In this paper I attempt to show that Searle’s identification of the subjectivity of conscious experience as being merely ontologically subjective, but not epistemically subjective is problematic, as it confuses epistemic subjectivity with axiological subjectivity. Since Searle regards the distinction between epistemic subjectivity and ontological subjectivity as an important basis for scientific studies of consciousness, the unsoundness of (...) his argument weakens his advocacy of Biological Naturalism. (shrink)

Zájem současné sociologie a dalších společenských věd o výzkumy spokojenosti a štěstí zatemňuje skutečnost, že původně právě sociologie chtěla „štěstí" poskytovat a nahrazovat tak náboženské přístupy ke světu. Tento implicitně nábo- ženský charakter je patrný i v rané české sociologii v dílech prvních propagátorů sociologie, jako byl především Emanuel Makovička, a později u některých následovníků a epigonů T. G. Masaryka, v meziválečném období zejména u Ladislava Kunteho, R. I. Malého, Alexandra Sommera-Batěka, Jindřicha Fleischnera a Jana Duška. Z hlediska vývoje české (...) sociologie šlo o zcela okrajové postavy, ačkoli mnohé z nich vynikly v jiných oblastech, jako celek jsou nicméně vyjádřením jednoho z aspektů dobových teoretických úvah o společnosti, jejím uspořádání a vývoji, na který by nemělo být zapomínáno. Zatímco T. G. Masaryka a pozdější akademické sociology „omezoval" vědecký charakter jejich práce, a i pokud směřovali k sociálnímu reformismu, oddělovali jej od teoretické sociologie, „sociologie vedoucí ke štěstí" nalezla plné uplatnění ve vizích a ambiciózních projek- tech těchto amatérských takésociologů - třebaže skončily faktickými nezdary nebo ani nedošly praktického naplnění, ostatně stejně jako v případě jejich pravzoru, Comtova pozitivistického apoštolátu. (shrink)

A hagyományunk egyik kérdése az, hogy az eszményeinknek van-e, és mekkora szerepe az emberi cselekvések terén. Az eszményi európai ember valamilyen, esetleg vitatható, esetleg megalapozhatatlan eszményt követ, de uralja szenvedélyeit, vágyait, érzelmeit és érdekeit. A kereszténység ezt felfokozta az erkölcsi cselekvése terén, míg a felvilágosodás a politikában tette mindenek feletti problémává a politikai tudást és eszményeket. Ezt az intellektualizált cselekvési eszményt azonban rendre kikezdik, és ezek a kihívást jelentő magyarázatok a romantikától a marxizmusig a valós cselekvésekre hivatkoznak, amelyek többé vagy (...) kevésbé eltérnek az eszménytől. Egy nemzedékkel ezelőtt, de még ma is sokak számára a valódi cselekvésmotívum az (osztály)érdek volt, míg a mai wokery a személyes érzéseket tette legitim és bármilyen cselekvést igazoló motívummá, míg az eszményeket az elnyomás eszközeinek tekinti, hiszen az eszményeket követni próbáló ember korlátozza önmagát. A kötet írásai a cselekvés szkeptikus megközelítését sugallják: a cselekvéseknek mindig sokféle motívuma lehet, valamilyen eszmény követésétől kezdve érdekek, szenvedélyek és érzelmek követéséig, és ezekről csak feltételezéseink lehetnek. A tapasztalatunk az, hogy a túlmoralizált politika ugyanúgy kellemetlen világot eredményez, mint az alulmoralizált. (shrink)

Woods et al. (2015) claim that secular Simple Reaction Time (SRT) slowing (Woodley et al. 2013), disappears once modern studies are corrected for software and hardware lag, and once Galton’s data are corrected for fastest-response selection. Here, this is challenged with a reanalysis of the secular slowing of SRT in the UK amongst large (N>500), population-representative age-matched (≊18-30 years) studies. Starting with Galton’s sample, this is assigned the simulated value estimated by Dodonova and Dodonov (2013, who like Woods et al. (...) were critical of secular SRT slowing, owing to measurement issues) on the basis that he collected the fastest of three trials (207.5ms). The two sexes in Galton’s study are combined (as in Woods et al.), raising the weighted sample mean to 208.5ms. Next is the Wilkinson and Alison (1989) study, which attempted to replicate Galton’s study one century later, collecting SRTs as part of an exhibit in the London Science Museum. An electronic chronoscope recorded SRTs on magnetic tape, and sampled over eight trials with micro-processor-determined variable foreperiods. The mean SRT value for the 1,189 participants aged between 20 and 29 is 245ms. The presence of long and variable foreperiods necessitates a penalty of 10ms (Dodonova & Dodonov, 2013). Another 10ms should be deducted based on key-pressing time (Dodonova & Dodonov, 2013), reducing the mean to 225ms. The studies of Deary and Der (2005) and Der and Deary (2006) are also included. The first utilized the highly representative Scottish Twenty-07 cohort. Dodonova and Dodonov (2013) identified a 53ms lag stemming from liquid crystal stimulus onset delay. This is subtracted from the weighted average of the two sexes (300.8ms), along with another 10ms for key-pressing time. The resultant mean is 237.8ms.Dodonova and Dodonov (2013) cleaned the male data in the Der and Deary (2006) study, collected from the representative UK Health and Lifestyle Survey, by removing cases for which SRT standard deviations exceeded those for choice RT. This reduced the N from 834 to 661, and also reduced the mean from 300ms to 284ms. The estimate was also penalized for LCD onset delay and key-pressing time, reducing the mean to 221ms. When the SRT value for the female sample is penalized equivalently the resulting value is 239ms. In order to simulate the female N for the purposes of taking a weighted average of both sexes, the actual female N is reduced in proportion to the male N (79.3%=881), yielding a weighted mean of 230.9ms for a combined sample-size of 1,472. Table 1 presents the data used in the analysis.Table 1 SRT means, sample sizes and sampling years for four large, age-matched UK samples[Table 1 here]Consistent with Dodonova and Dodonov (2013), N-weighted regression is employed, as the only data on sample variability is sample size. Figure 1 illustrating the secular trend in UK SRT over 100 years.[Figure 1 here] Figure 1. Secular SRT slowing across four large, representative studies from the UK spanning a century. Bubble-size is proportional to sample size. Combined N=6,622. The secular slowing between UK studies is statistically significant (β=0.97; 95% CI=0.969 to 0.971, N=6,622), at –22.8ms a century. Additional evidence for generational SRT slowing comes from Verhaeghen (2014), who suggested that the ratio of longitudinal to cross-sectional age-related slowing might tentatively infer generational changes in processing speed. Verhaeghen reports ratios for two SRT studies (0.91 and 1.15), implying both secular losses and gains. For the study of Deary and Der (2005), the SRT ratios are “censored because they were excessively large” (p. 256). In this study, the ratio of the cross-sectional slowing trend (taking the weighted average of all paired between-cohort differences rescaled in terms of change per decade for males and females), to the weighted average decadal longitudinal slowing trend for both the males and females is 0.73, for an N of 1,926 (cf. Woodley et al., 2014b, for a detailed reanalysis of this dataset). The weighted average of the three SRT ‘Verhaeghen ratios’ is 0.9 (N=4,078) – tentatively consistent with generational declines (i.e. a ratio of <1). In conclusion Woods et al. (2015) have undoubtedly made an important contribution to the debate concerning the role of software and hardware lag in the inflation of contemporary estimates of SRT, however the evidence for generational SRT slowing remains quite compelling. ReferencesDeary, I.J., & Der, G. (2005). Reaction time, age, and cognitive ability: Longitudinal findings from age 16 to 63 years in representative population samples. Aging, Neuropsychology, and Cognition, 12, 187–213.Der, G., & Deary, I.J. (2006). Age and sex differences in reaction time in adulthood: Results from the United Kingdom Health Lifestyle Survey. Psychology and Aging, 21, 62–73.Dodonova, Y.A., & Dodonov, Y.S. (2013). Is there any evidence of historical slowing of reaction time? No, unless we compare apples and oranges. Intelligence, 41, 674–687.Galton, F. (1890). Exhibition of instruments (1) for testing the perception of differences of tint, and (2) for determining reaction-time. Journal of the Anthropological Institute, 19, 27–29.Verhaeghen, P. (2014). The elements of cognitive aging: Meta-analyses of age-related differences in processing speed and their consequences. Oxford: Oxford University Press.Wilkinson, R.T., & Allison, S. (1989). Age and simple reaction time: Decade differences for 5,324 subjects. Journal of Gerontology, 44, 29–35.Woodley, M.A., Madison, G., & Charlton, B.G. (2014b). Possible dysgenic trends insimple visual reaction time performance in the Scottish Twenty-07 cohort: Areanalysis of Deary & Der (2005). Mankind Quarterly, 55, 110-124.Woodley, M.A., te Nijenhuis, J., & Murphy, R. (2013). Were the Victorians cleverer than us? The decline in general intelligence estimated from a meta-analysis of the slowing of simple reaction time. Intelligence, 41, 843–850.Woods, D.L., Wyma, J.M., Yund, E.W., Herron, T.J., & Reed, B. (2015). Factors influencing the latency of simple reaction time. Frontiers in Human Neuroscience, 9:131. (shrink)