The evolutionary significance of depressive symptoms: different adverse situations lead to different depressive symptom patterns

Although much depression may be dysfunctional, the capacity to experience normal depressive symptoms in response to certain adverse situations appears to have been shaped by natural selection. If this is true, then different kinds of situations may evoke different patterns of depressive symptoms that are well suited to solving the adaptive challenges specific to each situation. The authors called this the situation-symptom congruence hypothesis. They tested this hypothesis by asking 445 participants to identify depressive symptoms that followed a recent adverse situation. Guilt, rumination, fatigue, and pessimism were prominent following failed efforts; crying, sadness, and desire for social support were prominent following social losses. These significant differences were replicated in an experiment in which 113 students were randomly assigned to visualize a major failure or the death of a loved one.     

Rapid acquisition in concurrent chains: evidence for a decision model

Pigeons' choice in concurrent chains can adapt to rapidly changing contingencies. Grace, Bragason, and McLean (2003) found that relative initial-link response rate was sensitive to the immediacy ratio in the current session when one of the terminal-link fixed-interval schedules was changed daily according to a pseudorandom binary sequence (e.g., Schofield & Davison, 1997). The present experiment tested whether the degree of variation in delays across sessions had any effect on acquisition rate in Grace et al.'s (2003) rapid-acquisition procedure. In one condition ("minimal variation"), the left terminal link was always fixed-interval 8 s and the right terminal link was either fixed-interval 4 s or fixed-interval 16 s. In the other condition ("maximal variation"), a unique pair of fixed-interval values was used in each session. Responding was sensitive to the current-session immediacy ratio in both conditions, but across subjects there was no systematic difference in sensitivity. These results challenge the view that initial-link responding in the rapid-acquisition procedure is determined by changes in the learned value of the terminal-link stimuli, and suggests instead that a process resembling categorical discrimination may control performance. A decision model based on the assumption that delays are categorized as short or long relative to the history of delays provided a good account of the data and shows promise in being able to explain other choice phenomena.     

Visual form recognition threshold and the psychological refractory period

Two experiments studied the effect of a reaction time response (RT) on visual form recognition threshold when the temporal interval separating the RT stimulus and the recognition stimulus was short. In Experiment 1 an initial RT response to an auditory signal did not impair the subsequent forced-choice visual form recognition threshold. Interstimulus intervals (ISI) of 0, 50, 100, 150, and 200 msec were used; S was always aware of the ISI under test. In Experiment 2 a visual stimulus was used to elicit the R T response; this shift to an intramodal stimulus did not alter the recognition threshold. These data were interpreted as supporting the hypothesis that two stimulus events can be processed simultaneously even when the temporal interval between them is short.     

I didn't think of that

Consider cases in which an agent simply doesn.t think to do a certain thing, or doesn't think of a crucial consideration favoring doing a certain thing, or intends to do a certain thing but forgets to do it. In such a case, is the agent able to do the thing that she fails to do? Assume that commonly we all-in can do things that we do not do. Here I argue that, given this assumption, in the cases under consideration, too, commonly agents all-in can do the things they fail to do.     

“It takes a village to heal a child”: Necessary spectrum of expertise and benevolence by therapists,Non-Governmental Organizations,and the United Nations in managing war-zone stress in children traumatized by political violence

This article highlights the post-traumatic stress responses in some war-zone children who were exposed to political violence—witnessing unspeakable horror, maimings, brutal beatings, torture, and murders. Children inducted into rebel military units to serve as child-soldiers further traumatized self and others by raping and killing children and adults. Additionally, some children go without food, shelter, and adult protection, while finding themselves as refugees in a foreign country. This article advances some conceptual, technical, and practical issues in intervention with these children and provides a model of intervention that seeks to integrate established international policies of the United Nations (UN) and Non-Governmental Organizations (NGOs) along with cognitive, behavioral, and psychodynamic clinical approaches in the context of cultural/racial sensitivity and indigenous folk medicine. The child's adaptational strengths are discussed, and the recognition and management of transference and countertransference are not ignored in the treatment of traumatized children. Basically, the author's point of view is that Western models of interventions are very useful, but that the personal, cultural, social, spiritual, and economic resources of the child's homeland or village probably constitute the best system for healing and integration after brief or continuous exposure to political violence.     

Likelihood to rape in college males

This study assessed rape and sexual force proclivities among 159 college men at a small Protestant church-affiliated liberal arts college. No data were collected regarding ethnicity; however, institutional statistics indicate that the population was about 90% European American. There were 69 freshmen, 31 sophomores, 30 juniors, and 29 seniors (mean age = 19.34). Thirty-four percent reported some proclivity to rape or force sex. Participants who reported both proclivities indicated higher rape myth acceptance, offered more justifications for the increasing use of violence against women, were lower in rape empathy, held more gender stereotyped attitudes toward women, and accepted interpersonal violence more than those who reported no proclivities. However, by contrast, these groups did not differ on general emotional empathy.This paper is based on a Senior Honor's Research Project conducted by the first author while an undergraduate. The first author would like to thank Thomas Peterson for his assistance and encouragement during the early stages of the research process and Keith Yanner for his timely statistical suggestions.