Atkinson's “risk preference” model

Several revisions of Atkinson's risk preference model have been proposed in the last 10 years. The advantage of such revisions, shifting the maximum of the approach tendency to the difficult range in predicting choice behavior, is discussed. After summarizing the results of a series of studies on choice behavior in achievement-related situations, the conclusion is drawn that such a revision is unnecessary. Choice behavior is in agreement with the prediction of the original model when expectancies are assessed in the proper way. There may be other good reasons to revise Atkinson's original model. However, the tendency to choose difficulty levels with objective success probabilities less than .50 is not a reason.     

Sind empirische Theorien falsifizierbar?

Die Frage: sind empirische Theorien falsifizierbar? ist natürlich trivialerweise zu verneinen, falls man Theorien nicht als Mengen von Aussagen, sonden z. B., wie Sneed/Stegmüller, als mengentheoretische Strukturen plus intendierte Anwendungsbereiche auffaßt. Daß die Antwort, zumindest dann, wenn man die Fragestellung auf bestimmte physikalische Theorien einschränkt, auch bei Zugrundelegung der sogenannten Aussagen-Konzeption (statement view) nicht anders lautet, ist hingegen schon weniger trivial — obgleich seit langem bekannt, spätestens nämlich seit Duhems berühmter Argumentation gegen die Möglichkeit eines experimentum crucis. Andererseits beruht eine der derzeit einflußreichsten methodologischen Theorien, die von Popper, gerade auf der gegenteiligen Behauptung. Erst jüngst noch hat Popper seine Falsifizierbarkeits-Annahme, vor allem gegen Kritiken von Lakatos und Putnam, zu verteidigen versucht; die gleiche Intention verfolgen auch zwei Aufsätze von Musgrave. Es erscheint mir daher angebracht, kurz auf das Problem der Falsifizierbarkeit von empirischen Theorien zurückzukommen. Vorweg noch zwei Bemerkungen zur Terminologie: 1) Ich verwende, ohne mich auf den Versuch einer genaueren Explikation einzulassen, den Begriff ?(physikalische) Theorie“ in dem für den statement view geläufigen Sinne, wonach eine (deterministische) Theorie aus einer Menge von allgemeinen (deterministischen Natur-)Gesetzen besteht. Es sei ausdrücklich darauf hingewiesen, daß dies wenigstens partiell dem sonst üblichen Sprachgebrauch zuwider läuft: die ?Theorie des Planetensystems“ und die ?Mondtheorie“, beispielsweise, sind keine Theorien im genannten Sinne, weil sie außer auf allgemeinen Naturgesetzen noch auf spezifischen nicht-gesetzesartigen Annahmen beruhen. Andrerseits dürfte diese Deutung des Begriffs ?Theorie“ zumindest mit derjenigen von Popper übereinstimmen. — 2) Daß eine Aussage bzw. Aussagenmenge T falsifizierbar ist, soll, wie bei Popper, bedeuten, daß Basissätze (wahre oder falsche) existieren, die zusammen mit T eine inkonsistente Satzmenge bilden; m.a.W.: falsifizierbar ist T ?in the simple logical sense of being logically incompatible with some basic statements. It has ‘potential falsifiers’“. Basissätze sind dabei, grob gesagt, als Darstellungen von Beobachtungs-Befunden aufzufassen; Genaueres interessiert hier nur insoweit, als es sich umraum-zeitlich singuläre (Existenz-) Sätze handeln muß. Entsprechend soll schließlich T als falsifiziert gelten, wenn es wahre bzw. anerkannte oder akzeptierte Basissätze gibt, die T widersprechen. (Poppers Forderung, daß diese Basissätze ein reproduzierbares Phänomen beschreiben, also eine — allgemeine — ?falsifizierende Hypothese“ bewähren müssen, kann im vorliegenden Zusammenhang außer Betracht bleiben).     

Vocal cues in emotion encoding and decoding

This research examines the correspondence between theoretical predictions on vocal expression patterns in naturally occurring emotions (as based on the component process theory of emotion; Scherer, 1986) and empirical data on the acoustic characteristics of actors' portrayals. Two male and two female professional radio actors portrayed anger, sadness, joy, fear, and disgust based on realistic scenarios of emotion-eliciting events. A series of judgment studies was conducted to assess the degree to which judges are able to recognize the intended emotion expressions. Disgust was relatively poorly recognized; average recognition accuracy for the other emotions attained 62.8% across studies. A set of portrayals reaching a satisfactory level of recognition accuracy underwent digital acoustic analysis. The results for the acoustic parameters extracted from the speech signal show a number of significant differences between emotions, generally confirming the theoretical predictions.This research was supported by a grant from the Deutsche Forschungsgemeinschaft (Sche 156/8-5). The authors acknowledge collaboration of Westdeutscher Rundfunk, Cologne, in producing professional versions of actor emotion portrayals, and thank Kurt Balser, Theodor Gehm, Christoph Gierschner, Judy Hall, Ursula Hess, Alice Isen, and one anonymous reviewer for helpful comments and contributions.     

On the origin of illusory correlations

Empirical attempts to explain the genesis of illusory correlations have been largely confined to the demonstration of biased recall processes, although it has been acknowledged that perception and encoding processes may also contribute to the illusion. In the present research, illusory correlations between person types (a student versus a clerk) and educational attitudes (liberal versus authoritarian statements) are demonstrated under conditions where selective recall processes are highly unlikely. The cognitive bias that gives rise to the illusion is shown to already be effective when the stimulus information is perceived. Interestingly, there are marked interindividual differences between experimental participants. The results are discussed in the context of the literature on illusory correlations.     

Behavioral routines in decision making: the effects of novelty in task presentation and time pressure on routine maintenance and deviation

This article examines the role of behavioral routines in decision making. In order to induce routines, participants were confronted with recurrent route decisions in a computer-controlled trucking game, which allows for manipulation of routine acquisition and strength. During the final round of the game, time pressure and novelty in task presentation were varied as between-factors. It was hypothesized that time pressure would increase the likelihood of routine maintenance and novelty would increase the likelihood of deviation. Besides individual choices, response latencies and self-reports were additionally assessed to measure the amount of deliberation during decision making. Results show that time pressure strongly increased the probability of routine maintenance, even though the situation indicated the inadequacy of the routine. In contrast, novelty in task presentation provoked routine deviation and increased deliberation, as evident from response latencies and self-reports. Copyright © 1998 John Wiley & Sons, Ltd.     

Preferred Attributes of Effective Conflict Resolvers in Seven Societies: Culture,Development Level,and Gender Differences1

This research examined variations in preferred personality attributes of conflict resolvers. Using a semantic differential scale, youth from Malaysia, Japan, China, Philippines, Australia, Germany, and the United States described an effective conflict resolver. ANOVA procedures tested whether culture, country's level of economic development, or gender produced significant variations on conflict resolver preferences. Results show that conflict resolvers can be described along a continuum that has a compassionate peacemaker on one side and a dominating peacemaker on the other. Cultural differences produced marginal significance. The stronger effects were results of variations in power positions. A compassionate peacemaker was preferred by respondents from developing societies, rather than by those from the wealthier countries, and by women more than men.     

An information-theory approach to geometry for animal groups

Animal Cognition - One of the hardest problems in studying animal behaviour is to quantify patterns of social interaction at the group level. Recent technological developments in global positioning...     

The connection between social cohesion and personality: A multilevel study in the Kyrgyz Republic

As the discourse around societal cohesion grows and policy makers increasingly turn their attention towards improving cohesion, understanding its role for the lives of individuals becomes ever more important. Our study examines whether the social cohesion of the immediate living context is related to the strength of Big Five personality traits among individuals. Using data from a community survey of 6252 adults living in 30 rural sub-districts in the Kyrgyz Republic, where social cohesion is a sizable policy concern, we conduct a multilevel analysis of the relationship between sub-district cohesion and individual personality. Results indicate that higher levels of cohesion are significantly related to higher individual levels of agreeableness, conscientiousness and openness. However, no relationship is found with extraversion or neuroticism. Thus, where a social entity has higher cohesion, this entity will also have inhabitants with a greater prosocial and communal orientation towards others, greater conscientiousness and more openness to experience. These findings imply that social cohesion may be one geographical social indicator related to variation in personality traits. Moreover, the findings suggest that understanding social cohesion requires both macro- and micro-perspectives and that its connection to these particular personality traits should be taken into consideration.     

The changing practices of an infant psychiatry program: The McGill experience

The present paper describes the development of a university-based infant psychiatry program. The paper initially highlights the organizational structure of the program that involves some 20 professionals, then reports on 57 infants who presented with disruptive behavior disorders and ends by describing an innovative treatment program for fathers and an attempt to help teenage mothers in caring for their infants. © 1997 Michigan Association for Infant Mental Health