The function debate: between “cheap tricks” and evolutionary neutrality

We examine the use of the notion of natural selection in the philosophical debate on functions in biology. This debate has been largely shaped by the way in which different accounts assess various selective pressures in justifying claims about biological functions. Cummins (Functions: new essays in the philosophy of psychology and biology. Oxford University Press, Oxford, pp 157–172, 2002), one of the main proponents of the causal role account of biological functions, argues that a correctly understood neo-Darwinian notion of natural selection has nothing to do with functional talk in biology. In this paper, we counter Cummins’ account by showing that progress in the molecular approaches to evolutionary biology—specifically scientific data available in neo-functionalization research—offers valuable support to the etiological selectionist approach to functions in biological and biologically-related sciences. Finally, we use the presented data to build our own account of biological functions, which tries to avoid the wrong turns taken by both major strands in the biological function debate, namely causal role and etiological accounts. According to our account, the function of a certain gene or a protein in the biological system that contains it is a particular causal activity, or a group of causal activities whose manifestation is in a specific way determined by corresponding mechanisms of genetic expression. Also, we argue that in many important cases this particular expression of genetic activity was positively selected at a certain point in evolutionary history. Since we take selection as an important but not the only factor that grounds biological functions, we are committed to a weak etiological account.     

Social Desirability Scales as Indicators of Self-Enhancement and Impression Management

This article presents 2 studies testing Paulhus's (2002) assumption that unconscious self-enhancement and conscious impression management represent separate processes of socially desirable responding (SDR) that can be observed within 2 content domains (egoistic and moralistic bias). In Study 1, we devised egoistic and moralistic SDR scales intended to measure self-enhancement in honest responding and impression management under demands for positive self-presentation. In Study 2, we correlated scores on these scales with external indicators of self-enhancement and impression management. In honest responding, both SDR scales most strongly correlated with self-enhancement indicators, whereas under demands for positive self-presentation they correlated more strongly with external measures of impression management.     

Helping Enemies Communicate

Serbia’s northern province of Vojvodina has historically been home to people of different religions, cultures, and languages. Over the past century, the region experienced three wars and tremendous demographic change, which led to inter-group conflict. Projection and projective identification are dominant mechanisms in these social groups; distrust is prevalent, stemming from a series of transgenerational events and memory transmissions. A large group was formed from members of different ethnic groups with the intention of enabling the participants to gain awareness of their own role in these national/religious conflicts. This article discusses the formation and outcome of this experiment.     

When self-destructive thoughts flash through the mind: Failure to meet standards affects the accessibility of suicide-related thoughts

When individuals realize that they fail to attain important standards or expectations, they may be motivated to escape the self, which could lead thoughts of suicide to become more accessible. Six studies examined this hypothesis, mainly derived from escape theory (Baumeister, 1990). The results indicated that whenever individuals realize that they fail to attain an important standard, they experience increased accessibility of suicide-related thoughts (Studies 1-6). In line with the idea that such effects reflect motivations to escape from negative self-awareness, they were especially pronounced when associated with high levels of self-consciousness and escapist motivations (Study 1) and with a large discrepancy between self and standards (Studies 2-4). Moreover, failure to attain standards increased suicide-thought accessibility along with the desire for an altered state of consciousness (Study 5). Finally, increases in suicide-thought accessibility after failure were associated with simultaneous increases in accessibility of general concepts related to escape (Study 6). Implications of these findings for escape and terror management theories are discussed.     

When it matters how you pronounce it: the influence of regional accents on job interview outcome

The visual dimension has featured prominently in person perception in the last 25 years. Alone, this dimension cannot give the complete 'picture' of others because language and speech (i.e., the auditory dimension) are also highly informative. Social-cognition research investigates the role of auditory information for impression formation. In a series of experiments, we tested perceived competence, hirability, and socio-intellectual status of different targets based on their regional accents. Given identical content of statements in different conditions of an alleged job interview, regional German accents (Saxon, Bavarian, and Berlin) resulted in lower perceived competence and hirability than standard German, even though the Bavarian accent at the same time resulted in higher ratings of socio-intellectual status compared to other regional accents (Experiment 1). These findings were confirmed when using a broader population sample and a 'matched guise' technique (Experiment 2). Our findings indicate that regional accents, similar to faces, can be very powerful in creating differentiated pictures of individuals.     

Longitudinal changes in behavioral approach system sensitivity and brain structures involved in reward processing during adolescence

[Correction Notice: An Erratum for this article was reported in Vol 48(5) of Developmental Psychology (see record 2012-09244-001). Figure 2 was distorted in production. The correct version is presented in the erratum.] Adolescence is a period of radical normative changes and increased risk for substance use, mood disorders, and physical injury. Researchers have proposed that increases in reward sensitivity (i.e., sensitivity of the behavioral approach system [BAS]) and/or increases in reactivity to all emotional stimuli (i.e., reward and threat sensitivities) lead to these phenomena. The present study is the first longitudinal investigation of changes in reward (i.e., BAS) sensitivity in 9- to 23-year-olds across a 2-year follow-up. Support was found for increased reward sensitivity from early to late adolescence, and evidence was found for decline in the early 20s. This decline is combined with a decrease in left nucleus accumbens (Nacc) volume, a key structure for reward processing, from the late teens into the early 20s. Furthermore, we found longitudinal increases in sensitivity to reward to be predicted by individual differences in the Nacc and medial orbitofrontal cortex (OFC) volumes at baseline in this developmental sample. Similarly, increases in sensitivity to threat (i.e., behavioral inhibition system sensitivity) were qualified by sex, with only females participants experiencing this increase, and predicted by individual differences in lateral OFC volumes at baseline. (PsycINFO Database Record (c) 2012 APA, all rights reserved).     

Correction to urošević et Al. (2012)

Reports an error in "Longitudinal Changes in Behavioral Approach System Sensitivity and Brain Structures Involved in Reward Processing During Adolescence" by Sne?ana Uro?evi?, Paul Collins, Ryan Muetzel, Kelvin Lim and Monica Luciana (Developmental Psychology, Advanced Online Publication, Mar 5, 2012, np). Figure 2 was distorted in production. The correct version is presented in the erratum. (The following abstract of the original article appeared in record 2012-05404-001.) Adolescence is a period of radical normative changes and increased risk for substance use, mood disorders, and physical injury. Researchers have proposed that increases in reward sensitivity (i.e., sensitivity of the behavioral approach system [BAS]) and/or increases in reactivity to all emotional stimuli (i.e., reward and threat sensitivities) lead to these phenomena. The present study is the first longitudinal investigation of changes in reward (i.e., BAS) sensitivity in 9- to 23-year-olds across a 2-year follow-up. Support was found for increased reward sensitivity from early to late adolescence, and evidence was found for decline in the early 20s. This decline is combined with a decrease in left nucleus accumbens (Nacc) volume, a key structure for reward processing, from the late teens into the early 20s. Furthermore, we found longitudinal increases in sensitivity to reward to be predicted by individual differences in the Nacc and medial orbitofrontal cortex (OFC) volumes at baseline in this developmental sample. Similarly, increases in sensitivity to threat (i.e., behavioral inhibition system sensitivity) were qualified by sex, with only females participants experiencing this increase, and predicted by individual differences in lateral OFC volumes at baseline. (PsycINFO Database Record (c) 2012 APA, all rights reserved).     

Grouping illumination frameworks

According to Koffka (1935), the lightness of a target surface is determined by the relationship between the target and the illumination frame of reference to which it belongs. However, each scene contains numerous illumination frames, and judging each one separately would lead to an enormous amount of computing. Grouping those frames that are in the same illumination would simplify the computation. We report a series of experiments demonstrating that nonadjacent regions of the visual field under the same illumination level are perceptually grouped together and function, to some extent, as a single framework. A small coplanar group of patches under its own illumination exhibits compression of perceived range of gray shades. We obtained the reduction in compression in the presence of an identically illuminated 25-patch Mondrian tableau mounted nearby the coplanar group. The influence of the Mondrian display was reduced when it was (a) moved laterally away from the test display, (b) moved farther back in depth from the test display, or (c) rotated to a different orientation.