An empirical examination of relative deprivation theory

Relative deprivation theory centers around the proposition that the negative affect associated with judgments of one's own status is not simply a function of one's objective status. Instead, resentment, anger, dissatisfaction and other deprivation-related emotions vary with the subjective assessment of one's status. In the present experiment, subjects read vignettes in which the hypothesized preconditions of felt deprivation were manipulated. They then indicated the degree of perceived resentment and related cognitive-emotional factors attributed to the story characters. Perceptions of deprivation become more prevalent when an individual who lacks a desired outcome (X) (a) compares with another who does possess X, (b) feels entitled to X, (c) feels it was once feasible to attain X, and (d) feels it is not feasible to attain X in the future. The results also suggest that certain preconditions, such as the presence of a comparison other and entitlement, act conjunctively in affecting judgments of felt deprivation. Finally, personal control over desired outcomes appears to be important for relative deprivation theory.     

Perspectives on Factors Impacting Youth’s Reentry into Residential Care: An Exploratory Study

Multiple placements in therapeutic residential care is expensive, and is associated with poor outcomes; thus, identifying barriers to successful reintegration into the home and community school settings is essential for developing appropriate post-discharge supports, and reducing societal costs. Participants were seven youth (four female; three White/Caucasian, one Black/African American, one Hispanic/Latino, two multi-racial) recently readmitted to a therapeutic residential care program and five of their primary caregivers (four female; four White/Caucasian, one Black/African American). Through semi-structured interviews with caregivers and youth, this exploratory study investigated (1) the perceptions of preparedness for the youth’s successful transition from therapeutic residential care to the home setting, (2) the post-discharge factors that contributed to the youth’s return to care, and (3) the lessons learned about the youth’s transition from therapeutic residential care to home. The results of this exploratory, qualitative study revealed rich information about youth and their caregivers’ perspectives about their experiences prior to returning to care, such as the importance of healthy relationships (family and peers), transition planning, and post-discharge supports at the individual, family, and school levels.     

Communication of Genetic Risk Information to Daughters in Families with Fragile X Syndrome: The Parent’s Perspective

Parental approaches to communicating information about genetic disorders to their children may be an important determinant in how the children manage stress as well as their adjustment and adaptation to that information. We explored communication patterns through structured interviews with 46 parents of daughters who learned about their genetic risk status as minors. Three different levels of knowledge about fragile X syndrome were explored: 1) informing that it has been diagnosed in the family and is an inherited disorder, 2) informing about the possibility of a daughter being a carrier, and 3) if testing had been done, informing the daughter of her actual carrier status. Additionally, parental perceptions of their daughter’s understanding of the information were explored along with frequency of discussions. We found that communication about genetic risk was initiated by the parents. Five disclosure patterns were identified with variations in style, content, and frequency of communication related to the information that was being disclosed. Aspects of resilient communication were present for all levels of disclosure; however, as the information became more personally relevant for the daughter such as disclosure about the possibility of “being a carrier” for fragile X syndrome and there was uncertainty regarding potential outcomes, the conversations included fewer resilient characteristics. Uncertainty about what and how to present information may negatively affect a parent’s ability to include elements of resilient communication when disclosing genetic risk information.     

Working memory deficits, increased anxiety-like traits, and seizure susceptibility in BDNF overexpressing mice

BDNF regulates components of cognitive processes and has been implicated in psychiatric disorders. Here we report that genetic overexpression of the BDNF mature isoform (BDNF-tg) in female mice impaired working memory functions while sparing components of fear conditioning. BDNF-tg mice also displayed reduced breeding efficiency, higher anxiety-like scores, high self-grooming, impaired prepulse inhibition, and higher susceptibility to seizures when placed in a new empty cage, as compared with wild-type (WT) littermate controls. Control measures of general health, locomotor activity, motor coordination, depression-related behaviors, and sociability did not differ between genotypes. The present findings, indicating detrimental effects of life-long increased BDNF in mice, may inform human studies evaluating the role of BDNF functional genetic variations on cognitive abilities and vulnerability to psychiatric disorders.     

Glucocorticoids are required for extinction of predator stress-induced hyperarousal

Background

The role of glucocorticoids in extinction of traumatic memories has not been fully characterized despite its potential as a therapeutic target for acquired posttraumatic stress disorder (PTSD). The predator stress paradigm allows us to determine whether glucocorticoids mediate the extinction of both context-dependent and context-independent fear memories.

Methods

Male C57BL/6J mice were exposed to a predator (cat) then repeatedly exposed to the predator stress context in the absence of the cat. Context-dependent (associative) fear memory was assessed as suppression of activity during re-exposure to the predator stress context without the cat (extinction trials). Context-independent fear (non-associative) was assessed seven days after extinction trials using measures of hyperarousal and anxiety-like behaviours in environments unlike the predator stress context. To assess the role of glucocorticoids, mice were injected with metyrapone (50 mg/kg) 90 min prior to extinction trials in predator stressed mice and context-dependent and context-independent fear memories were assessed. Finally, metyrapone-treated predator stressed mice were injected with corticosterone (5 or 10 mg/kg) immediately following extinction trials and context-dependent and context-independent fear memories were assessed.

Results

Repeated re-exposure to the predator stress context without the cat present extinguished context-dependent fear memory, and also reduced hyperarousal, a generalized, chronic PTSD-like symptom. We show that extinction of context-independent predator stress-induced hyperarousal is dependent on endogenous glucocorticoids during the extinction trials. Furthermore, the inhibition of extinction by metyrapone on startle amplitude was reduced by exogenous administration of corticosterone following extinction trials. Overall, these data implicate glucocorticoids in the extinction of hyperarousal, a core symptom of PTSD.