Number as a cognitive technology: evidence from Pirahã language and cognition

Does speaking a language without number words change the way speakers of that language perceive exact quantities? The Pirah? are an Amazonian tribe who have been previously studied for their limited numerical system [Gordon, P. (2004). Numerical cognition without words: Evidence from Amazonia. Science 306, 496-499]. We show that the Pirah? have no linguistic method whatsoever for expressing exact quantity, not even "one." Despite this lack, when retested on the matching tasks used by Gordon, Pirah? speakers were able to perform exact matches with large numbers of objects perfectly but, as previously reported, they were inaccurate on matching tasks involving memory. These results suggest that language for exact number is a cultural invention rather than a linguistic universal, and that number words do not change our underlying representations of number but instead are a cognitive technology for keeping track of the cardinality of large sets across time, space, and changes in modality.     

Relational and imageric recall in young and older adults under conditions of high task demand

Research indicates the presence of an age-related pictorial processing deficit, for which the elderly may attempt to compensate through the use of relational information. Cognitive asynchrony theory, a recent synthetic formulation which unites elements of the generalized slowing hypothesis, environmental support theory, and the item-specific/relational information distinction, has proven useful in a number of experiments in explaining these aspects of visual cognitive aging. The present experiments tested this theoretical formulation under high processing demand conditions in both the relational and the pictorial/item-specific realm. Young and older adults yielded a complex pattern of results consistent with the cognitive asynchrony synthesis of these theoretical considerations. The present experiments add to the growing body of findings indicating that the cognitive subsystems of memory decline at different rates, that the differences in cognitive processing between young and older adults tend to be more quantitative than qualitative, and that the global age-related memory deficits of popular belief are in fact relatively circumscribed and specific. This research was supported by grant AG11605 from the National Institute on Aging, and by a grant from the College of Science and Mathematics, California State University.     

The Development and Validation of a Personological Measure of Work Drive

Using six studies based on 23,823 individuals in diverse settings, we developed and validated a personality measure of Work Drive—a disposition to work long hours and extend oneself for one's job. The factor structure was confirmed in four settings. Work Drive was related to job performance showing incremental validity beyond cognitive aptitude and Big Five personality traits in five validation studies. It predicted academic performance at six different grade levels, even beyond Big Five traits. Construct validity was examined via work values, job involvement, normal personality scales, satisfaction measures, and cognitive ability. Little adverse impact was found. Occupational groups differed on Work Drive. Overall validity and areas of application were discussed.     

The Efficacy Advantage: Factors Related to the Formation of Group Efficacy1

Extending previous research investigating factors related to the formation of group efficacy, this research examined predictors across cultures and groups of various types. Based on theories of collective cognition, hypothesized predictors included self‐efficacy, group affect, status differential, and collectivism. These were investigated using 2 methodologies (simulation and field study), each conducted in 2 cultural contexts. Self‐efficacy, group affect, and collectivism were significant predictors, explaining between 27% and 49% of the variance in group efficacy across the studies. Implications for theory and research are discussed.     

The odd-even effect in Sudoku puzzles: effects of working memory, aging, and experience

The odd-even effect in numerical processing has been explained as the easier processing of even numbers compared with odd numbers. We investigated this effect in Sudoku puzzles, a reasoning problem that uses numbers but does not require arithmetic operations. Specifically, we asked whether the odd-even effect occurred with Sudoku puzzles and whether individual differences in working memory (WM), aging, and experience with Sudoku modulated this effect. We manipulated the presence of odd and even numbers in Sudoku puzzles, measured WM with the Wisconsin Card Sorting Test and backward digit span task, tested older and younger adults, and collected Sudoku experience frequency. Performance on Sudoku was more accurate for even puzzles than odd ones. Younger, experienced, and higher-WM participants were more accurate on Sudoku, but these individual difference variables did not interact with the odd-even effect. Odd numbers may impose more cognitive load than even numbers, but future research is needed to examine how age, experience, or WM may influence the odd-even effect.     

The Development and Validation of Brief and Ultrabrief Measures of Values

Values are a central personality construct and the importance of studying them has been well established. To encourage researchers to integrate measures of values into their studies, brief and ultrabrief instruments were developed to recapture the 10 values measured by the 40-item Portrait Values Questionnaire (PVQ; Schwartz, 2003 Schwartz, S. H. (2003). A proposal for measuring value orientations across nations. In Questionnaire development report of the European Social Survey (pp. 259–319). Retrieved from http://www.europeansocialsurvey.org/index.php?option=com_docman&;task=doc_view&;gid=126&;Itemid=80 [Google Scholar]). Rigorous psychometric procedures based on separate derivation (N = 38,049) and evaluation (N = 29,143) samples yielded 10- and 20-item measures of values, which proved to be successful at capturing the patterns and magnitude of correlations associated with the original PVQ. These instruments should be useful to researchers who would like to incorporate a values scale into their study but do not have the space to administer a longer measure.     

An application of the prototype willingness model to drivers' speeding behaviour

We tested the prototype willingness model (PWM). The participants (N = 198) completed online questionnaire measures of PWM constructs (Time 1) and subsequent speeding behaviour (Time 2). Path analyses showed that the PWM accounted for 89% of the variance in subsequent (self‐reported) speeding behaviour. This significantly exceeded the variance accounted for by the theory of planned behaviour. In line with the PWM, both behavioural intention and behavioural willingness had direct effects on behaviour. Behavioural willingness had a significantly larger effect. Attitude and subjective norm both had indirect effects on behaviour through both behavioural intention and behavioural willingness. Prototype (similarity) perceptions had indirect effects on behaviour through behavioural willingness only. The findings support the notion that driving is governed by reactive decision‐making (willingness), underpinned by prototype perceptions, attitudes and subjective norms, to a greater extent than it is deliberative decision‐making (intentions), underpinned by attitudes and subjective norms. The implications for safety interventions are discussed.     

Cognition at risk: Gestalt/feature-intensive processing, attention deficit, and substance abuse

Attention deficit hyperactive disorder (ADHD) is associated with elevated levels of substance abuse, but the cognitive linkages involved have been little explored. The present study builds upon earlier work showing that more gestalt, as opposed to feature-intensive, styles of processing are conductive to substance abuse, especially in those with ADHD symptoms. The work reported here indicates that a protective factor against substance abuse may lie in relatively efficient heuristic processing, especially synthetic or inferential heuristic processing, but further demonstrates that those with ADHD symptoms tend to have poorer abilities in this regard, even at the subclinical, nondiagnosed level. Results are discussed in terms of the gestalt/featureintensive processing theory of cognition.