Songs as a medium for embedded reproductive messages

Research shows that sensational news stories as well as popular romance novels often feature themes related to important topics in evolutionary psychology. In the first of four studies described in this paper we examined the song lyrics from three Billboard charts: Country, Pop, and R&B. A content analysis of the lyrics revealed 18 reproductive themes that read like an outline for a course in evolutionary psychology. Approximately 92% of the 174 songs that made it into the Top Ten in 2009 contained one or more reproductive messages, with an average of 10.49 reproductive phrases per song. Although differences in the frequency of different themes between charts were found, further analyses showed that the most popular/bestselling songs contained significantly more reproductive messages. An analysis of the lyrics of opera arias and art songs also revealed evidence for many of the same embedded reproductive messages extending back more than 400 years.     

Drug use as consumer behavior

Seeking integration of drug consumption research by a theory of memory function and emphasizing drug consumption rather than addiction, Müller & Schumann (M&S) treat drug self-administration as part of a general pattern of consumption. This insight is located within a more comprehensive framework for understanding drug use as consumer behavior that explicates the reinforcement contingencies associated with modes of drug consumption.     

Discrimination of amount of spinal flexion for movements made with and without vision after lumbar disc replacement

Discrimination of differences between small lumbar flexion movements made when standing may differ depending on whether vision is available. Dependence on general vision during trunk movements may be increased following surgery, in which an intervertebral disc is replaced with a prosthetic disc. This study investigated whether the availability of vision changed discrimination of small differences in lumbar forward flexion movement when standing for patients with lumbar disc replacement and healthy peers. 20 volunteers without a history of back pain and 20 with disc replacement undertook a 100-trial sequence of forward flexion movements to a set of physical stops, making an absolute judgement as to the position after each movement. General (nontarget) vision during the movement was available or removed randomly trial by trial. Availability of vision did not affect discrimination of flexion movements of the lumbar spine either in normal healthy individuals or those with disc replacement.     

You must have been a beautiful baby: ratings of infant facial attractiveness fail to predict ratings of adult attractiveness

Facial attractiveness has been studied extensively, but little research has examined the stability of facial attractiveness of individuals across different stages of development. We conducted a study examining the relationship between facial attractiveness in infants (age 24 months and under) and the same individuals as young adults (age 16–18 years) using infant and adult photographs from high school yearbooks. Contrary to expectations, independent raters’ assessments of infant facial attractiveness did not correlate with adult facial attractiveness. These results are discussed in terms of the adaptive function of heightened attractiveness in infancy, which likely evolved to elicit and maintain parental care.     

Balancing cognitive demands: control adjustments in the stop-signal paradigm

Cognitive control enables flexible interaction with a dynamic environment. In 2 experiments, the authors investigated control adjustments in the stop-signal paradigm, a procedure that requires balancing speed (going) and caution (stopping) in a dual-task environment. Focusing on the slowing of go reaction times after stop signals, the authors tested 5 competing hypotheses for post-stop-signal adjustments: goal priority, error detection, conflict monitoring, surprise, and memory. Reaction times increased after both successful and failed inhibition, consistent with the goal priority hypothesis and inconsistent with the error detection and conflict hypotheses. Post-stop-signal slowing was greater if the go task stimulus repeated on consecutive trials, suggesting a contribution of memory. We also found evidence for slowing based on more than the immediately preceding stop signal. Post-stop-signal slowing was greater when stop signals occurred more frequently (Experiment 1), inconsistent with the surprise hypothesis, and when inhibition failed more frequently (Experiment 2). This suggests that more global manipulations encompassing many trials affect post-stop-signal adjustments.     

Turtles (Pseudemys nelsoni) learn about visual cues indicating food from experienced turtles

We investigated whether turtles (Pseudemys nelsoni) could learn about a visual object cue to obtain food reinforcement by observing conspecifics that had learned the task. This study was designed with a three part task which, if completed by the observer turtles, would provide evidence of their abilities to learn from other turtles using stimulus enhancement, goal emulation, or copying. All four P. nelsoni turtles tested after observation of a trained demonstrator, whom they had direct access to during the demonstrator training trials, learned not only to follow another turtle to the stimulus indicating food, but also, in the absence of the demonstrator, to approach the correct stimulus regardless of spatial position. Therefore, all four P. nelsoni turtles tested showed evidence of stimulus enhancement learning. This is the first experimental study of social learning in any aquatic reptile demonstrating that they have the ability to learn from conspecifics.     

Compensatory cognition associated with egalitarian goals

Two experiments examine nonconscious processes that facilitate pursuing egalitarian goals. It was hypothesized that when working on a task not known to be relevant to egalitarian goals there is heightened ability to detect opportunities to goal pursuit (goal-relevant people) embedded in the task, even when they are best ignored for optimal performance. Further, this selective attention should cease when the goal is sated, despite increased semantic accessibility of these opportunities that results from satiation. Experiment one introduced egalitarian goals via writing an essay about failing to be egalitarian to Black men. Next, an ostensibly unrelated task presented Black and White men in an array of faces as distracters to a focal task. Task performance was disrupted only by arrays containing Black men, and only among participants primed with egalitarian goals. This was not due to increased semantic accessibility of the concept “Black men.” Experiment two had all participants write failure essays and then write second essays. Half wrote affirming essays about egalitarianism and Black men. Despite this increased semantic accessibility of the group “Black men,” distracted attention was not evidenced. Instead, the goal had been satisfied and goal pursuit shut down. In contrast, the remaining participants wrote affirming essays in an irrelevant domain. Despite the decreased semantic accessibility, goal accessibility remained and was evidenced by selective attention to Black men. These findings reveal Black men are associated not with stereotypes, but egalitarian goals. They also point to the role goal completion versus self affirmation play in goal pursuit.     

Egalitarian goals trigger stereotype inhibition: A proactive form of stereotype control

Stereotype activation is often described as beyond control, unable to be prevented by willing it or engaging the self-regulatory system. Four experiments illustrate that this initial stage of the stereotyping process is controllable. Stereotypes are shown to be implicitly inhibited as part of a goal shielding process. In each experiment, egalitarian goals are triggered through a task in which participants contemplate a past failure at being egalitarian to African American men. This is followed in each experiment by a task that measures stereotype activation/inhibition using reaction times to words (either control words or stereotype-relevant words) that follow the presentation of either faces of Black or White men. The first two experiments examine participants with egalitarian goals versus those with a control goal, whereas the last two experiments examine people with egalitarian goals versus those whose egalitarian strivings have been satisfied (by contemplating success at being egalitarian). Only participants with egalitarian goals exhibit stereotype inhibition, and this occurs despite the fact that they lack awareness of the inhibition and lack the conscious intent to inhibit stereotypes at the time the response is made.     

Understanding driver anger and aggression: attributional theory in the driving environment

Two studies tested the applicability of Weiner's (1995, 1996, 2001, 2006) attributional model of social conduct to roadway environments. This model highlights the role of inferences of responsibility after making causal judgments for social transgressions. Study 1 employed written scenarios where participants were asked to imagine themselves driving on a major highway. The degree of controllability and intentionality of the driving act was manipulated experimentally by altering the specific event-related details provided to the participants. Study 2 extended this research to life events by having participants complete online driving diaries every 2 days, identifying their most negative/upsetting encounter with another motorist. The most anger-provoking event was selected from among 4 diary entries and participants were asked to respond to a questionnaire similar to that used in Study 1. Path analyses in both studies generally supported predictions derived from Weiner's model; the association between perceived controllability, intentionality, and dispositional locus of causality of the negative driving event and subsequent anger was mediated by perceptions of responsibility. Additional results in Study 2 suggested that low perceived controllability, intentionality, and dispositional locus of causality were associated with reduced perceived responsibility, which, in turn, facilitated feelings of sympathy. Anger was associated with aggressive responses to the offending driver, whereas sympathy was associated with prosocial responses. Recommendations were offered for improved driver safety, including the development of attributional retraining programs to combat self-serving attributional biases, teaching novice drivers about both formal and informal roadway communication, and the promotion of forgiveness among drivers