Possible selves in patients with right- versus left-onset Parkinson’s disease

Possible selves can be used to self-regulate and guide behavior towards what is desired to be achieved or avoided in life. Previous work suggests laterality effects exist within the brain regarding approach and avoidance systems to achieve self-regulation. A modified version of the possible selves task was administered to 45 patients with PD (22 right-onset and 23 left-onset) and 25 community dwelling control subjects (CS). Only 11.1% of patients exhibited balance among their hoped-for and feared possible selves versus 28% of CS. More right-onset patients used a promotion strategy whereas more left-onset patients used a prevention strategy. Patients with left-onset PD thought more about their feared selves, exhibiting reduced goal-directed behavior. Findings among the left-onset group indicate relative dependence of self-regulation on right-sided avoidance brain systems. This may point to an inability to move away from negative outcomes and to work towards rewarding outcomes, which could affect psychological health.     

Data-Driven Belief Revision in Children and Adults

The ability to use numerical evidence to revise beliefs about the physical world is an essential component of scientific reasoning that begins to develop in middle childhood. In 2 studies, we explored how data variability and consistency with participants’ initial beliefs about causal factors associated with pendulums affected their ability to revise those beliefs. Children (9–11 years old) and college-aged adults ran experiments in which they generated, recorded, and interpreted data so as to identify factors that might affect the period of a pendulum. In Study 1, several children and most adults used observed evidence to revise their initial understanding, but participants were more likely to change incorrect noncausal beliefs to causal beliefs than the reverse. In Study 2, we oriented participants toward either an “engineering” goal (to get an effect) or a “science” goal (to discover the causal structure of the domain) and presented them with variable data about potentially causal factors. Science goals produced more belief revision than engineering goals. Numerical data, when presented in context, with appropriate structure, can help children and adults reexamine their beliefs and initiate and support the process of conceptual change and robust scientific thinking.     

All role transitions are not experienced equally: Associations among self-change,emotional reactions,and self-concept clarity

Individuals experience numerous transitions across various roles during their lives. These role transitions can be disruptive to the way individuals view their identity, and thus their well-being; however, role transitions do not affect all individuals equally. Therefore, in the current work, we focused on two factors which may influence self-concept clarity and explain differential experiences following role transitions. We tested the relationship between the amount of self-change and positive emotions in reaction to a role transition predicting self-concept clarity, including both role entries (e.g. parenthood/new relationships, Studies 1–4) and role exits (e.g. divorce/job loss, Studies 3 and 4). Across several studies and all role transitions, we found that among individuals who experienced low levels of positive emotions after a role transition, greater self-change predicted reduced self-concept clarity. Among individuals who experienced higher levels of positive emotionality, this association did not emerge.     

When demand accelerates demand: Trailing the bandwagon

Consumers generally prefer scarce products, which has been related to their exclusiveness. Currently scarce products, however, are not necessarily exclusive, but could be scarce because many other consumers previously bought them. We propose that consumers also prefer scarce products in this situation, which an appeal to uniqueness cannot explain. Three experiments support our predictions and reveal that scarcity effects even occur when consumers only see traces of others' behavior through emptied shelf space. Furthermore, this bandwagon effect disappears when uniqueness is threatened due to others in close spatial distance.     

Global inhibition and midcourse corrections in speeded aiming

When some perceptual-motor relationships are reversed, participants might adopt a global inhibition strategy that replaces all normal movements with reversed movements. In two experiments, participants practiced moving a cursor from a start position to target locations. In a perceptual-motor reversal condition, in which horizontal but not vertical movements were reversed, participants were trained to move only to certain locations. Testing involved moving to all locations under the same reversal condition. Training on a subset of locations yielded partial transfer to untrained locations. These results support a global inhibition hypothesis modified to include both midcourse corrective movements and training specificity.     

A mental practice superiority effect: less retroactive interference and more transfer than physical practice

Two experiments explored the benefits to retention and transfer conferred by mental practice. During familiarization, participants typed 4-digit numbers and took an immediate typing test on both old and new numbers. Participants then typed old 4-digit numbers, either physically or mentally, with either a different response configuration or the opposite hand from that used during familiarization. On a delayed test, participants physically typed both old and new numbers with the same response configuration and hand used during familiarization. Mental practice led to less retroactive interference and more transfer than did physical practice, supporting the hypothesis that mental practice strengthens an abstract representation that does not involve specific effectors.     

Gesturing towards the future: cognition,big data,and the future of comparative gesture research

Animal Cognition - The field of ape gesture research has grown significantly in the past two decades, but progress on the question of gesture development has been limited by methodological and...