Cognitive costs of encoding novel natural activities: Can “learning by doing” be distracting and deceptive?

Findings from action memory research suggest that the enactment of simple actions and naturalistic activities results in similar memory performance to that from their observation. However, little is known about potential differences between the conditions during the encoding of the to-be-studied actions and activities. We analysed the cognitive costs of encoding two novel naturalistic activities studied via enactment or via observation in four experiments. In addition to memory performance, we measured objective cognitive costs with a secondary task and subjective cognitive costs with repeated ratings of mental effort and estimates of general activity difficulty. Memory performance was comparable across study conditions throughout all experiments. The enactment of activities repeatedly resulted in slower reaction times in the secondary task than did observation, suggesting higher objective costs. In contrast, subjective costs were rated lower after enactment than after observation. Findings from a pantomimic enactment condition suggested that the low ratings of subjective costs after enactment represent a misinterpretation of task demands. Our findings imply that the widespread belief about “learning by doing” as an easy way of learning does not stem from an actual advantage in memory performance, but rather from continuous feedback about one's performance resulting from enactment.     

Mikel Burley (ed.): Wittgenstein,religion, and ethics

International Journal for Philosophy of Religion -     

Conceptualizing Creativity: General and Cultural Biases in Gough's Creative Personality Scale

This study analyzes the validity of Gough's Creative Personality Scale (CPS) for the Adjective Check List (ACL) by using 1773 Swiss, South Korean, and Mainland Chinese students as a sample. Four sources of potential bias were identified in Gough's CPS, two of which are general and two cultural in nature. The two general biases were investigated by conducting correlation analyses and evaluating alternative scoring methods for the CPS. As a result of the first bias, checking a large number of adjectives was found to be more important for achieving a high score than checking the relevant ones. Due to the second bias, the CPS score mostly depends on the number of positive adjectives checked while negative items have little impact. The two cultural biases were analyzed using an implicit version of the CPS (iCPS) and factor analysis. The latter revealed three different clusters of creativity type: exploratory‐type, socially responsible‐type, and intellectual‐type creativity. Based on cultural background, they are all weighted differently, causing a potential experiential bias in the CPS. Findings indicate that in South Korea and Mainland China socially responsible‐type creativity dominates whereas in Switzerland exploratory‐type creativity prevails. Findings from the iCPS suggest the second cultural bias, the socially desirable responding bias arising from differences in responding styles among the three cultures.     

Evaluating the Psychometric Properties of a Measure of Ethnic Identity Among Black South African Youth

The authors examined the dimensionality and psychometric properties of the Multigroup Ethnic Identity Measure (MEIM) among Black South African adolescents (ages = 13–14; 52% female) representing several ethnic groups (Ndebele, Pedi, Sotho, Swati, Tsonga, Tswana, Venda, Xhosa, Zulu) and evaluated the measure for differential item functioning primarily among four ethnic groups (Sotho, Tswana, Xhosa, and Zulu). Results indicated that a two-dimensional model best represented the data, reflecting ethnic search/clarity and ethnic affirmations. Subsequently, we evaluated the equivalence of the MEIM among the four South African ethnic groups and a sample of African American adolescents (M_age = 15.57 years; SD = 1.22; 51% female). Further analyses revealed that configural and metric models were excellent across the four South African ethnic groups and the African American group. However, scalar invariance (i.e., intercept) was not found; the item intercepts were different for the South African ethnic groups and African Americans. Findings are discussed with consideration for conducting research on ethnic identity among youth in South Africa.     

Addressing two blind spots of commonly used experimental designs: The Highly‐Repeated Within‐Person approach

Two well documented but still neglected blind spots of often‐used study designs limit a researcher's ability to make inferences about psychological phenomenon. First, typical designs focus on effects of conditions at the group level and are not able to assess the extent to which effects characterize each participant in the study. This blind spot can lead to erroneous (or incomplete) conclusions about the effects of manipulations both for a given participant and at the group level. Second, commonly used research designs often use a limited sample of stimuli, constraining conclusions to the particular stimuli. This blind spot can lead to non‐replication when different stimuli are used. We propose that the Highly‐Repeated Within‐Person (HRWP) approach helps mitigate these limitations. Using a study on the effects of anti‐smoking messages, we illustrate how the HRWP approach helps alert researchers when the conclusions at the group level may not apply to all (or any) participant, quantifies the heterogeneity of effects of manipulations across people, and increases confidence regarding the generalizability of the effects. We discuss how the HRWP approach may help conceptualize issues of replicability in a new light.     

Explaining individuals' justification of layoffs

This research addresses why organizational downsizing, given its adverse impact on both organizations and individuals, continues to be a popular management practice. Drawing on system justification theory, we argue that individuals justify downsizing to preserve the legitimacy of the prevailing social‐political system. Across two studies, we surveyed a total of 527 employees and examined whether the perceived likelihood of downsizing, past experiences of layoffs, and the anticipation of future layoffs enhance individuals' justification of downsizing. We also took into account cognitive and motivational biases for justifying the status quo. Our results indicate that individuals' motivation to defend and justify downsizing may strengthen its stability within society, even though implications are largely negative for those involved.     

High maternal aggression in dwarf hamsters (Phodopus campbelli and P. sungorus)

The defense of offspring, termed maternal aggression, is a highly conserved behavior in mammals, including rodents. This study examined relative levels of maternal aggression in two closely related dwarf hamster species, Phodopus campbelli and P. sungorus, that normally inhabit high latitude, boreal environments. When tested with first litters and with the breeder male remaining with the female (for P. campbelli the male is necessary for successful rearing of offspring), both species exhibited high levels of maternal aggression with average duration of aggressive behavior>80 sec for a 10 min test. For P. sungorus, males are not required to rear offspring. P. sungorus females with either one or multiple litters (singly housed after impregnation) exhibited significantly higher levels of aggression (>300 sec) relative to females co‐housed with the sires. In terms of species differences in attack style, P. campbelli exhibited a boxing or clawing strategy for ～50% of total attack time, but for P. sungorus, this form of attack occurred<5% of the time. For P. sungorus, attacks to the vulnerable belly and flank constituted>90% of all attacks, but these regions were attacked ～50% of the time for P. campbelli. A survey of levels of maternal aggression of rodents in other genera suggests that maternal aggression in Phodopus is at the high end of the spectrum. Results of this study suggest that the presence of the breeder male may actually suppress aggression in P. sungorus. This fact, as well as its high level of aggression and its distant relationship to mice and rats, suggest P. sungorus as a possible model for future studies on the neurobiological basis of maternal aggression. The relationship between the high rates of maternal aggression and life history strategy in Phodopus is discussed. Aggr. Behav. 00:000–000, 2005. © 2005 Wiley‐Liss, Inc.     

What's in a Name? Persuasion Perhaps

Four studies demonstrate the potential influence of name similarity on perceptions of similarity to oneself in general, liking, and compliance. Some participants received a scenario in which the protagonist's name was similar to their own. These participants indicated that the character was more similar to themselves, reported greater liking for the person, and expressed more willingness to comply with a request for help than control participants did. In addition, the persuasive influence of name similarity on questionnaire return rates indicated that both undergraduates and college professors completed and returned questionnaires more frequently if the name on the cover letter was similar to their own. The influence of name similarity was independent of name familiarity. The importance of name similarity in eliciting overt behavioral action is discussed.