Evolutionary function of dreams: A test of the threat simulation theory in recurrent dreams

proposed an intriguing and detailed evolutionary theory of dreams which stipulates that the biological function of dreaming is to simulate threatening events and to rehearse threat avoidance behaviors. The goal of the present study was to test this theory using a sample of 212 recurrent dreams that was scored using a slightly expanded version of the DreamThreat rating scale. Six of the eight hypotheses tested were supported. Among the positive findings, 66% of the recurrent dream reports contained one or more threats, the threats tended to be dangerous and aimed at the dreamer, and when facing a threat, the dreamer tended to take defensive or evasive actions that were possible and reasonable. However, less than 15% of the recurrent dreams depicted realistic and probable situations critical for one's physical survival or reproductive success and the dreamer rarely succeeded in fleeing the threat despite important and appropriate efforts. The findings thus provide mixed support for the threat simulation theory.     

Lexical retrieval constrained by sound structure: the role of the left inferior frontal gyrus

Positron emission tomography was used to investigate two competing hypotheses about the role of the left inferior frontal gyrus (IFG) in word generation. One proposes a domain-specific organization, with neural activation dependent on the type of information being processed, i.e., surface sound structure or semantic. The other proposes a process-specific organization, with activation dependent on processing demands, such as the amount of selection needed to decide between competing lexical alternatives. In a novel word retrieval task, word reconstruction (WR), subjects generated real words from heard non-words by the substitution of either a vowel or consonant. Both types of lexical retrieval, informed by sound structure alone, produced activation within anterior and posterior left IFG regions. Within these regions there was greater activity for consonant WR, which is more difficult and imposes greater processing demands. These results support a process-specific organization of the anterior left IFG.     

The expectation of guilt and resistance to temptation

Children's expectations about the emotions that surround a moral transgression were examined. In experiment 1, children aged 4-6 years and 8-9 years listened to a story about a child who resisted but then yielded to the temptation to take a sweet without permission. In line with earlier findings (Nunner-Winkler and Sodian, 1988), older children were more likely than younger children to expect the wrongdoer to feel pleased at resisting, but to feel bad after yielding to, temptation. In experiment 2, the relation between expectations of emotion and actual resistance to temptation was studied. Children aged 5-6 years again made judgements about a story character who eventually yielded to temptation. Their own resistance to temptation was assessed by means of a cheating task: children were given an opportunity to cheat by peeking during the experimenter's absence. Children who did not peek were more likely to attribute morally oriented feelings to the story protagonist. The results suggest that children who readily anticipate the emotional consequences of wrongdoing are more likely to resist the temptation to transgress.     

Inference processes in Obsessive-Compulsive Disorder: Some clinical observations

In this paper we outline a cognitive model of Obsessive-Compulsive Disorder (OCD) which proposes that the core belief of OCD evolves through a series of illogical inferences. These faulty inference processes involve inferring the plausibility of events on the basis of irrelevant associations, dismissing actual evidence on the grounds of going beyond surface reality to a deeper reality, and finally inferring that a completely fictional narrative is a remote probability. A therapy aimed specifically at changing these inference processes is illustrated with case examples of OCD clients who had not benefited from conventional behavior therapy. The inference based approach (IBA) complements existing cognitive-behavioral therapy but suggests that in certain cases, the conventional cognitive therapy view of OCD beliefs as exaggerated fears of remote possibilities may actually reinforce the obsessional belief since even remote events are real. The IBA on the contrary suggests that an important goal in therapy is to highlight this confusion found in OCD between imagination and reality and illuminate for the OCD client how their compulsions, far from reassuring them about a remote possibility, actually take them further away from reality and reinforce their imaginary doubt.     

Can intergroup behaviors be emitted out of self-determined reasons? Testing the role of group norms and behavioral congruence in the internalization of discrimination and parity behaviors

Bringing self-determination theory to understand why intergroup behaviors are emitted, two studies were conducted to investigate how group norms and individuals' congruence with these norms predicted self-determination to pursue two types of intergroup behaviors (parity and discrimination). Experiment 1 (N = 97) manipulated ingroup norms in favor of parity versus of discrimination and assessed the behavior participants displayed (congruent or incongruent with the norm) and their motivations for emitting this behavior. The manipulated norms significantly influenced group members' behaviors. When the ingroup norm was parity, participants whose behavior was congruent with this norm reported more self-determination to emit this behavior. When the ingroup norm was prodiscrimination, participants whose behavior was congruent with this norm were less self-determined. Experiment 2 (N = 139) replicated and extended these findings in a more conflictual intergroup setting. Results are discussed in light of motivational and intergroup theories.     

Single prolonged stress disrupts retention of extinguished fear in rats

Clinical research has linked post-traumatic stress disorder (PTSD) with deficits in fear extinction. However, it is not clear whether these deficits result from stress-related changes in the acquisition or retention of extinction or in the regulation of extinction memories by context, for example. In this study, we used the single prolonged stress (SPS) animal model of PTSD and fear conditioning procedures to examine the effects of prior traumatic stress on the acquisition, retention, and context-specificity of extinction. SPS administered one week prior to fear conditioning had no effect on the acquisition of fear conditioning or extinction but disrupted the retention of extinction memories for both contextual and cued fear. This SPS effect required a post-stress incubation period to manifest. The results demonstrate that SPS disrupts extinction retention, leading to enhanced fear renewal; further research is needed to identify the neurobiological processes through which SPS induces these effects.     

Unconditioned freezing is enhanced in an appetitive context: implications for the contextual dependency of unconditioned fear

It has been well established that expression of conditioned fear is context independent, but the context dependency of unconditioned fear expression has rarely been explored. A recent study reported that unconditioned freezing in rats is enhanced in a familiar context, which suggests that unconditioned fear expression can be modulated by contextual processing. In order to further explore this possibility we examined unconditioned freezing in novel, familiar, and appetitive contexts; and attempted to identify brain regions critical for context-related changes in unconditioned freezing by measuring c-Fos mRNA levels in emotional circuits. Unconditioned freezing was enhanced in the appetitive context, and this enhancement was accompanied by increased c-Fos mRNA expression in the medial amygdala and hippocampus, but attenuated expression in the medial prefrontal cortex. In the appetitive context, expectation of a reward coupled with detection of threat may have enhanced unconditioned fear expression, which suggests that unconditioned fear expression can be modulated by contextual factors. Context-related expectancy mismatch may explain the enhancement of unconditioned fear expression seen in this study and warrants further examination.     

Typical intellectual engagement and cognition in the ninth decade of life: The Lothian Birth Cohort 1921

Investment traits-the tendency to seek out and engage in cognitive activity-might affect intellectual growth across the life span, specifically the development from fluid to crystallized intelligence. Here we explore how childhood IQ at age 11 years, IQ at age 79, and the investment trait Typical Intellectual Engagement (TIE) at age 81 affect the mean level and change in verbal fluency scores, used as an indicator of crystallized intelligence, across the ages 79, 83, and 87 in the Lothian Birth Cohort 1921 (maximum N = 569; Deary, Whiteman, Starr, Whalley, & Fox, 2004). A first latent growth model showed significant variance in the mean level of verbal fluency and significant decline in verbal fluency from age 79 to age 87. The rate of change was invariant across study participants in the Lothian Birth Cohort 1921. A second model found that IQ at age 11 significantly predicted IQ at age 79 (β = .66; p < .001), which in turn predicted verbal fluency and TIE in the ninth decade of life with standardized path parameters of .46 and .15 (p < .001), respectively. TIE had a significant association with verbal fluency (β = .14, p = .002); together, IQ at age 11 and 79 and TIE accounted for 25.5% of the variance in verbal fluency. A final model identified the TIE subfactor of intellectual curiosity as a significant mediator of the effect of IQ on verbal fluency; the TIE subfactors abstract thinking, reading, and problem solving showed no significant associations. In summary, TIE-in particular, intellectual curiosity-significantly mediated the effects of IQ on crystallized intelligence in old age. Because there was no significant between-subjects variance in verbal fluency trajectories in the current study, neither TIE nor IQ were associated with individual differences in cognitive decline. (PsycINFO Database Record (c) 2012 APA, all rights reserved).     

Tuning in to Kids: an effectiveness trial of a parenting program targeting emotion socialization of preschoolers

This article reports on an effectiveness trial of the Tuning in to Kids (TIK) parenting program. TIK aims to improve emotion socialization practices in parents of preschool children; it is a universal prevention program that teaches parents the skills of emotion coaching and also targets parents' own emotion awareness and regulation. The present study followed a 2 × 2 (Treatment Condition × Time) design. One hundred twenty-eight parents of children ages 4.0-5.11 years were recruited from preschools and randomized into intervention and waitlist conditions. Parents in the intervention condition (n = 62) attended a six-session group parenting program delivered by community practitioners who followed intervention fidelity protocols. Parents and preschool teachers completed questionnaires twice during the preschool year: at preintervention and at follow-up (approximately 7 months later). Parents reported on their emotion socialization beliefs and practices, other parenting practices, and on child behavior. Teachers reported on child behavior (Social Competence and Anger-Aggression). Data were analyzed using multilevel modeling. At follow-up, compared to the control group, intervention parents were significantly less emotionally dismissive in their beliefs, less dismissive and more coaching in their practices in response to children's negative emotions, and more positively involved. Although there were improvements in both conditions over time for parent-reported child behavior and teacher-reported social competence, compared to the waitlist group, intervention parents reported a significantly greater reduction in number of behavior problems. This trial demonstrates the potential for community agencies and practitioners in real-world settings to deliver a new parenting program that targets emotional communication in parent-child relationships.