Spontaneous gestures influence strategy choices in problem solving

Do gestures merely reflect problem-solving processes, or do they play a functional role in problem solving? We hypothesized that gestures highlight and structure perceptual-motor information, and thereby make such information more likely to be used in problem solving. Participants in two experiments solved problems requiring the prediction of gear movement, either with gesture allowed or with gesture prohibited. Such problems can be correctly solved using either a perceptual-motor strategy (simulation of gear movements) or an abstract strategy (the parity strategy). Participants in the gesture-allowed condition were more likely to use perceptual-motor strategies than were participants in the gesture-prohibited condition. Gesture promoted use of perceptual-motor strategies both for participants who talked aloud while solving the problems (Experiment 1) and for participants who solved the problems silently (Experiment 2). Thus, spontaneous gestures influence strategy choices in problem solving.     

Who is good at this game? Linking an activity to a social category undermines children's achievement

Children's achievement-related theories have a profound impact on their academic success. Children who adopt entity theories believe that their ability to perform a task is dictated by the amount of natural talent they possess for that task--a belief that has well-documented adverse consequences for their achievement (e.g., lowered persistence, impaired performance). It is thus important to understand what leads children to adopt entity theories. In the experiments reported here, we hypothesized that the mere act of linking success at an unfamiliar, challenging activity to a social group gives rise to entity beliefs that are so powerful as to interfere with children's ability to perform the activity. Two experiments showed that, as predicted, the performance of 4- to 7-year-olds (N = 192) was impaired by exposure to information that associated success in the task at hand with membership in a certain social group (e.g., "boys are good at this game"), regardless of whether the children themselves belonged to that group.     

Examining the components of children's peer liking as antecedents of school adjustment

Children's social interactions with their peers influence their psychosocial adjustment; consequently, the relationship between class‐wide peer liking, same‐gender peer liking, and school adjustment was explored in two age groups. Peer liking was analysed using the social relations model (SRM). In Study 1, 205 children (103 female and 102 male, M_age= 7.15, SD= 7 months) completed measures of peer liking and school adjustment, and teachers completed the Short‐Form Teacher Rating Scale of School Adjustment (Short‐Form TRSSA). In Study 2, 197 children (98 female and 90 male, M_age= 9.87, SD= 5.9 months) completed measures of peer liking and school adjustment. Both studies yielded evidence of reciprocal liking and individual differences in the ratings of liking awarded to, and elicited from, both peer groups. Multigroup path analysis, with groups created according to gender, revealed that elements of liking predicted different aspects of school adjustment with some variation according to age and gender. Together, these findings suggest that the SRM can be used to examine peer liking and underscore the importance of children's peers for school adjustment.     

Empowerment and team effectiveness: an empirical test of an integrated model

The authors developed a model of team empowerment as an emergent state linking inputs (I) with processes (P) and, thereby, with outcomes (O) in the context of an expanded team IPO framework. Using survey responses from 452 members of 121 empowered service technician teams, along with archival quantitative performance and customer satisfaction criteria, the authors tested the model using structural equation modeling techniques. The model was generally supported, although areas for improvement were evident. Specifically, empowerment partially mediated the influences of various inputs on team processes, whereas team processes fully mediated the influence of empowerment on outcomes. Directions for future research and application are discussed.     

An Archetypal Symbol of Water in the Amazon

Archetypal symbols traced on the thousand-year-old art of the moundbuilders of the Marajoara people support the assumption that some sort of ritual honoring of a great goddess took place at the mouth of the Amazon River prior to European colonization. An intriguing figurine, 30 centimeters high, seems to have played a central role in these rituals. The fish-like body of the goddess, covered in red, black, and white spirals, suggests the regenerating process of the waters. A double portal around the vulva is a gateway to undiscovered regions, perhaps associated to life after death, as corroborated by other symbols. Breast-shaped vases found at the same archeological site are covered in images of shoots, leaves, and scrolls in mandala-like symbols. These vases suggest that the cult of the goddess might have included the drinking of her milk, which was made of hallucinogenic plants. The cult of this “Lady of the Waters” may have helped to lessen the psychological hardships of tropical life in the ebb and flow of the tides and the recurrent season of floods, which brought aquatic animals with it. Frogs, snakes, fish, turtles, scorpions, and water birds represented in the ancient pottery were possibly part of the goddess domain. Today the same archetypal manifestation that influenced the prehistorical adaptation is present in the modern Christian devotion to Our Lady of Nazareth. Exploring the native and the Christian cults can help us understand what is missing in today's psychology and guide us to take right action toward water preservation around the world. The symbolic approach of this indigenous art can provide rich soil in which to nourish a sustainable connection with water, flora, and fauna.     

The mechanism underlying inhibition of saccadic return

Human observers take longer to re-direct gaze to a previously fixated location. Although there has been some exploration of the characteristics of inhibition of saccadic return (ISR), the exact mechanisms by which ISR operates are currently unknown. In the framework of accumulation models of response times, in which evidence is integrated over time to a response threshold, ISR could reflect a reduction in the rate of accumulation for saccades to return locations or an increase in the effective criterion for response. In two experiments, participants generated sequences of three saccades, in response to a peripheral or a central cue. ISR occurred across these manipulations: saccade latency was consistently increased for movements to the immediately previously fixated location. Latency distributions from individual observers were fit with a Linear Ballistic Accumulator model. ISR was best accounted for as a change in the accumulation rate. We suggest this parameter represents the overall desirability of a particular course of action, the evidence for which may be derived from a variety of sensory and non-sensory sources.     

Long-term ability to interpret facial expression after traumatic brain injury and its relation to social integration

There is considerable evidence that individuals with traumatic brain injury (TBI) experience problems interpreting the emotional state of others. However, the functional implications of these changes have not been fully investigated. A study of 13 individuals with severe TBI and an equal number of matched controls found that TBI participants had significantly more difficulty interpreting facial expression and matching emotions to social situations. A significant relationship was also established between social integration and ability to interpret facial expression for TBI participants. These results support the inclusion of therapy targeting this area within rehabilitation programs for individuals with TBI.     

Self-ordered pointing as a test of working memory in typically developing children

The self-ordered pointing test (SOPT; Petrides & Milner, 1982) is a test of non-spatial executive working memory requiring the ability to generate and monitor a sequence of responses. Although used with developmental clinical populations there are few normative data against which to compare atypical performance. Typically developing children (5-11 years) and young adults performed two versions of the SOPT, one using pictures of familiar objects and the other hard-to-verbalise abstract designs. Performance improved with age but the children did not reach adult levels of performance. Participants of all ages found the object condition easier than the abstract condition, suggesting that verbal processes are utilised by the SOPT. However, performance on the task was largely independent from verbal and nonverbal cognitive ability. Overall the results suggest that the SOPT is a sensitive measure of executive working memory.