How Experts Solve a Novel Problem in Experimental Design

Research on expert-novice differences has mainly focused on how experts solve familiar problems. We know far less about the skills and knowledge used by experts when they are confronted with novel problems within their area of expertise. This article discusses a study in which verbal protocols were taken from subjects of various expertise designing an experiment in an area with which they were unfamiliar. The results showed that even when domain knowledge is lacking, experts solve a novel problem within their area of expertise by dividing the problem into a number of subproblems that are solved in a specified order. The lack of domain knowledge is compensated for by using abstract knowledge structures and domain-specific heuristic strategies. However, the quality of their solutions is considerably lower than the quality attained by experts who were familiar with the type of problem to be solved. The results suggest that when experts are confronted with novel problems as compared with familiar problems, their form of reasoning remains intact, but the content of their reasoning suffers due to lack of domain knowledge.     

Stereotype content of refugee subgroups in Germany

Stereotypes of refugee subgroups are still understudied. We contribute to this body of research by investigating differences in stereotype content, meaning warmth and competence ratings, of refugee subgroups in Germany (N = 264). Most extant Stereotype Content Model research is based on observed warmth and competence mean values. We applied latent variable modelling using the alignment optimisation to ensure meaningful and reliable mean value comparisons. Generic refugees were rated as lacking warmth and competence. Warmth assessments of refugee subgroups varied depending on flight motives, geographical origin, and religious affiliation, implying that perceptions of threat and competition differed between these subgroups. Fewer differences emerged in competence assessments, indicating that refugee groups are generally regarded as lacking status. Our results enhance knowledge of the stereotype content of refugee subgroups and make a methodological contribution to stereotype content research.     

No pain,no gain: cross-lagged analyses of posttraumatic growth and anxiety,depression, posttraumatic stress and prolonged grief symptoms after loss

Background and objectives: Major negative life-events including bereavement can precipitate perceived positive life-changes, termed posttraumatic growth (PTG). While traditionally considered an adaptive phenomenon, it has been suggested that PTG represents a maladaptive coping response similar to cognitive avoidance. To clarify the function of PTG, it is crucial to establish concurrent and longitudinal associations of PTG with post-event mental health problems. Yet, longitudinal studies on this topic are scarce. The present study fills this gap in knowledge.

Design: A two-wave longitudinal survey was conducted.

Methods: Four-hundred and twelve bereaved adults (87.6% women) filled out scales assessing PTG and symptoms of depression, anxiety, prolonged grief, and posttraumatic stress at baseline and 6 months later.

Results: The baseline concurrent relationships between all symptom levels and PTG were curvilinear (inverted U-shape). Cross-lagged analyses demonstrated that symptom levels did not predict levels of PTG 6 months later, or vice versa.

Conclusions: Findings suggest PTG after loss has no substantive negative or positive effects on mental health. Development of specific treatments to increase PTG after bereavement therefore appears premature.     

Are you my mummy? Long-term olfactory memory of mother’s body odour by offspring in the domestic cat

Animal Cognition - Longevity of odour memories, particularly those acquired during early development, has been documented in a wide range of taxa. Here, we report that kittens of the domestic cat...