Effects of stress and sex on acquisition and consolidation of human fear conditioning

We examined the relationship between stress hormone (cortisol) release and acquisition and consolidation of conditioned fear learning in healthy adults. Participants underwent acquisition of differential fear conditioning, and consolidation was assessed in a 24-h delayed extinction test. The acquisition phase was immediately followed by an 11-min psychosocial stress period (arithmetic test combined with a public speech). Salivary cortisol was sampled at various time points before and after acquisition and retention of fear conditioning. Results showed two effects of endogenous cortisol. Post-acquisition cortisol correlated with fear acquisition in male but not female participants. In addition, post-acquisition cortisol correlated with consolidation of fear but only in those participants with high cortisol levels. We conclude that in the short term, a robust and sexually dimorphic relationship exists between fear learning and stress hormone levels. For those participants whose fear learning is accompanied by high stress hormone levels, a long-term relationship exists between cortisol release and memory consolidation. These short-term and long-term effects may relate to the differential involvement of mineralocorticoid and glucocorticoid receptor subtypes, respectively. The findings have implications for understanding the role of stress, sex, and hormones in different stages of fear learning and memory.     

Schedule thinning following communication training: using competing stimuli to enhance tolerance to decrements in reinforcer density

Functional communication training (FCT) is a widely used treatment for individuals with developmental disabilities who exhibit severe behavior problems. One inherent challenge of employing FCT as a treatment in the community is that reinforcement for appropriate communication cannot always be immediate or even possible in some circumstances. Of the few studies that have incorporated some form of schedule thinning for communication, most have reported disruption of communication or increases in problem behavior when the schedule of reinforcement is thinned. In the current study, we compared FCT with extinction to FCT with extinction and access to competing stimuli. After conducting a functional analysis, a competing stimulus assessment was performed to identify stimuli that produce reinforcement that ostensibly competes with reinforcement that maintains problem behavior. It was hypothesized that FCT with competing stimuli would result in more stable reductions in problem behavior during schedule thinning, which would ultimately result in quicker achievement of the treatment goal (low levels of problem behavior under the terminal reinforcement schedule for communication) than FCT without competing stimuli. Results confirmed this hypothesis.     

EFFECTS OF EVIDENCE ON ATTITUDES:

Abstract— A 1979 study by Lord, Ross, and Lepper has been widely cited as showing that examination of mixed evidence on a topic leads to polarization of altitudes The polarization phenomenon, we suggest, in fact encompasses two distinct change patterns—a shift from an initially moderate to a more extreme position (regarded here as genuine polarization) and a shift from an initially neutral to a moderate position (which might better be termed "articulating a position") The findings reported here indicate that genuine polarization is a real but infrequent outcome of exposure to mixed evidence In addition, we offer data in support of the view that the effective component of such interventions is simply cognitive engagement, rather than exposure to new evidence.     

MICROGENETIC STUDY OF CHANGE:

The microgenetic method has been advocated by developmentalists as a promising tool in the study of change. Despite convergence of findings across investigators and diverse domains, however, several fundamental questions need to be answered (a). Is the potential for change specific to periods of developmental transition? (b). Is change domain-general or domain-specific? (c). Why and how does change occur? Answers to these questions bear on the extent to which microgeneiic study of change can be interpreted as providing insight into the natural change process.     

Why Utilize Complexity Principles in Social Inquiry?

Complexity is introduced as a fitting paradigmatic orientation to social inquiry. A complexity approach is compared and contrasted with other holistic social inquiry orientations (systems thinking, cybernetics, and ecological thinking) and constructivist styles of thinking that have informed and guided the evolution of qualitative social inquiry.     

Tactics and empathy: Defences against projective identification

In this paper the author argues that interpretations made when the analyst has not done the emotional work of recognising and bearing what kind of object she has become in the patient's psychic reality will be experienced as empty tactics – even lies – rather than interpretations of integrity. However, interpreting from a position of bearing the truth of the patient's perception will be technically difficult and indicate turmoil as the analyst struggles to take in the patient's view of her. If the analyst avoids integrating her own picture of herself with the patient's picture (despite giving voice to the patient's picture) the split inside the analyst will be felt and intensify the patient's need to split. Vignettes demonstrate how the analyst, believing she is trying to understand, may become a projective‐identification‐refusing object and the issue of the analyst's disclosure of her countertransference is examined. Ultimately, the author argues, a capacity to receive and bear projective identification requires empathy with both patient and analyst‐as‐patient's object, engaged in a process about which both are ambivalent.