Cognitive functions of gamma-band activity: memory match and utilization

Oscillatory neural activity in the gamma frequency range (>30Hz) has been shown to accompany a wide variety of cognitive processes. So far, there has been limited success in assigning a unitary basic function to these oscillations, and critics have raised the argument that they could just be an epiphenomenon of neural processing. We propose a new framework that relates gamma oscillations observed in human, as well as in animal, experiments to two underlying processes: the comparison of memory contents with stimulus-related information and the utilization of signals derived from this comparison. This model attempts to explain early gamma-band responses in terms of the match between bottom-up and top-down information. Furthermore, it assumes that late gamma-band activity reflects the readout and utilization of the information resulting from this match.     

Life-Review Technique in the Treatment of PTSD in Elderly Patients: Rationale and Three Single Case Studies

Persons exposed to traumatic events in childhood and adolescence may suffer from the symptoms of posttraumatic stress disorder (PTSD) well into old age. The aim of this paper is to introduce a structured life-review technique for the treatment of elderly PTSD patients. This technique centers on the discussion and evaluation of each consecutive stage of life. The therapist encourages the patient to reminisce on both positive and negative experiences; positive coping experiences are reinforced. A single session on the traumatic event is integrated into the discussion of the stages of life, which are dealt with in chronological order. In the following, 3 case studies (e.g., survivors of the 1945 Dresden bombing) are presented. Psychometric measures (PTSS-10, IES-R) for the case studies are reported. Finally, the potential and limitations of the pilot study and the new approach are discussed.     

Mind, Self, and Personality: Dynamic Interactions from Late Childhood to Early Adulthood

This paper aims to integrate research on mind, personality, and self-development using a general model which hypothesizes that mind and personality are organized in 3 levels. The first level includes environment-oriented, domain-specific systems that specialize in the representation of and interaction with particular types of relationships in the environment in both the cognitive and the social realms. The second level comprises self-oriented monitoring and representation processes that build maps of the environment-oriented systems. Self and identity derive from the interaction between these 2 levels, which is subject to the constraints and the system's processing capacity at the successive ages. These constraints may be taken as the third level of the self. Efficiency in overcoming these constraints is determined by the self-oriented processes, generating feelings and self-representations of self-worth. These feelings are idiosyncratic, and function as a personal constant, which is applied on self-evaluation and self-representations. This constant is rescaled and differentiated with development. Thus, we have simultaneously both modular and transmodular constructs in the mind and the self, which change with relative independence of each other under the constraints of the general processing capabilities and the personal constant. A series of studies are presented to support this model, and its implications for life-span theories of development are discussed.     

The costs and benefits of processing emotional stimuli during rapid serial visual presentation

Using a dual-target identification task during rapid serial visual presentation (RSVP), we examined facilitation and interference effects exerted by emotional stimuli. Emotionally arousing first targets (T1s) were encoded with higher accuracy than neutral T1s. At the same time, identification of a second neutral target (T2) was impaired reflecting a failure of disengaging attention from arousing T1s. Similar interference was triggered by arousing filler stimuli that were not voluntarily searched for in the RSVP stream (Experiment 2). In Experiment 3, we showed that interference is reduced (though facilitation for arousing T1s is maintained) when the second task itself involves variations in emotional arousal. Vice versa, when arousal associated with the T2 stimulus was predictable, interference recurred (Experiment 4). Our findings indicate that the perceived emotional intensity of a stimulus is a determinant of successful identification during RSVP: Encoding of arousing stimuli is reliably facilitated. Interference effects with subsequent processing arise independently and are strongly modulated by the overall task context and specific processing strategies.     

Between- and within-person level motivational precursors associated with career exploration

Career exploration is a critical process for child and adolescent development leading people toward suitable work and developing a vocational identity. The present study examined the role of motivational precursors, namely work valences and personal agency beliefs, in explaining in-breadth and in-depth career exploration. Given the dynamic nature of motivation, we teased apart the between-person differences and within-person variabilities in motivational precursors to examine how they are independently associated with career exploration. Two hundred one high school students comprised the sample and were surveyed three consecutive years. Results revealed that work valences and agency beliefs were associated with career exploration at both the between- and within-person level. Further, when individuals exhibited greater level of agency beliefs and positive valences, they were more likely to exhibit more in-depth exploration one year later. Implications for career guidance are discussed.     

Latent profiles of work motivation in adolescents in relation to work expectations,goal engagement,and changes in work experiences

Motivation plays a key role in successful entry into working life. Based on a cross-sectional and a one-year longitudinal study, we used a person-centered approach to explore work-related motivation (i.e., autonomous goals, positive affect, and occupational self-efficacy) among 577 students in 8th grade (Study 1) and 949 adolescents in vocational training (Study 2). Based on latent profile analysis, in both studies we identified four groups that were characterized by different levels of overall motivation and one group characterized by low positive affect and mean levels in autonomous goals and self-efficacy. Profiles characterized by high levels of motivation showed the highest levels of positive work expectations and goal engagement and the lowest levels of negative work expectations in Study 1 and the highest levels of person-job fit, work engagement, and job satisfaction in Study 2. Moreover, latent difference score analysis showed that motivational profiles predicted changes in person-job fit and work engagement across one year but not in job satisfaction. The results imply that career counselors should be aware of characteristic motivational patterns of clients that may require specific counseling approaches.