Reliability of 2D:4D measurements using a direct method suitable for clinical settings

The second to fourth digit ratio (2D:4D) indicates androgen exposure during early development. Numerous methods are used in the assessment of 2D:4D, however, some are not reliable enough and others are difficult to perform in large epidemiological studies. We assessed the reliability of 2D:4D using a direct method with a caliper, and compared it with a computer-assisted analysis on scanned images. Both methods were moderately correlated, but the scan method produced slightly lower 2D:4D. The main source of variation was differences between subjects (real variation). Reliability was higher among men and among younger participants. All reliability coefficients were higher than 0.8 when three repeated measurements were averaged. Our results suggest that reliability is influenced by participants’ characteristics. Digit ratios determined directly with calipers are reliable when repeated measurements are averaged.     

Perhaps There Is Accounting for Taste: Evaluating the Creativity of Products

Ratings on a creativity rating scale of students' designs of a hands-free mobile phone holder were compared for 2 sets of raters: experts (professional art teachers) and novices (visual art students). Reliabilities of total creativity scores were high for both groups, and interjudge consistency on total creativity scores, as well as on grades, was high among novices, but not as high among experts. Correlations between grades and total functional creativity scores within and across groups of raters (experts and novices) were highly significant. Scores on the scale resembled those yielded by assessments using grades and the scale did not yield better consistency among judges than conventional grades. Nonetheless, it provided a differentiated assessment of products that made it possible to explain the basis of experts' opinions and the reasons for disagreement, and to discuss the strengths and weaknesses of students' designs in a systematic and differentiated way.     

Cyberbullying Victimization among High School and University Students in Ghana

ABSTRACT

This study sought to establish the extent of cyberbullying among students in Ghana, its consequences on the victims, and the characteristics of the victims. The study found that nearly all participants had experienced one form of cyberbullying before. Victims of cyberbullying were not very different from non-victims in psychological wellbeing. The effect of cyberbullying on psychological wellbeing was small, and no clear profile characterizing victims emerged. The present findings should be an eye-opener for Ghanaian parents, educators and health professionals and set the stage for further studies to understand the Ghanaian situation.     

The Importance of Modeling Method Effects: Resolving the (Uni)Dimensionality of the Loneliness Questionnaire

In this study, we tested whether children and young adults varied the size and color of their tree drawings based on hypotheses related to the emotional characterization of the drawn topic. We asked a sample of 80 5- to 11-year-old children and adults to draw a tree (baseline drawing) and then a happy versus sad tree from their imagination. Results indicate that size, but not color, is used to express emotion under free drawing conditions. We discuss implications for clinical psychologists and practitioners interpreting drawings of the tree.     

The time course of spoken word learning and recognition: studies with artificial lexicons

The time course of spoken word recognition depends largely on the frequencies of a word and its competitors, or neighbors (similar-sounding words). However, variability in natural lexicons makes systematic analysis of frequency and neighbor similarity difficult. Artificial lexicons were used to achieve precise control over word frequency and phonological similarity. Eye tracking provided time course measures of lexical activation and competition (during spoken instructions to perform visually guided tasks) both during and after word learning, as a function of word frequency, neighbor type, and neighbor frequency. Apparent shifts from holistic to incremental competitor effects were observed in adults and neural network simulations, suggesting such shifts reflect general properties of learning rather than changes in the nature of lexical representations.     

The gender-marking effect in spoken word recognition

In this paper we examine whether the recognition of a spoken noun is affected by the gender marking—masculine or feminine—that is carried by a preceding word. In the first of two experiments, the gating paradigm was used to study the access of French nouns that were preceded by an appropriate gender marking, carried by an article, or preceded by no gender marking. In the second experiment, subjects were asked to make a lexical decision on the same material. A very strong facilitatory effect was found in both cases. The origin of the gender-marking effect is discussed, as well as the level of processing involved—lexical or syntactic.     

Reaction times reveal the contribution of the different receptor components in luminance perception

Piéron (1914, 1920, 1952) demonstrated that simple reaction time decays as a hyperbolic function of luminance. Similarities between cell latencies and reaction time (RT) to luminance suggest that this relationship may be determined by retinal processes. If the exponent of the Piéron function is specific to a given sensory modality, as assumed by some authors (e.g., Bonnet, 1992a, 1992b; Norwich, 1987), it should reflect receptor activities. Consequently, functions with different exponents should fit data for different luminance ranges. In a contrast-discrimination experiment, we investigated this question with a large range of luminance levels in a two-alternative spatial forced-choice task. The results of the experiment show that three functions with different exponents fit RT to the three luminance ranges (scotopic, mesopic, and photopic). The exponent decreases with increasing luminance. The findings indicate that the exponent and the asymptotic latency of the RT function reflect receptor activities of the visual system.     

On the relation between stimulus intensity and processing time: Piéron’s law and choice reaction time

Piéron (1914, 1920, 1952) demonstrated that simple reaction time (SRT) decays as a hyperbolic function of luminance in detection tasks. However, whether such a relationship holds equally for choice reaction time (CRT) has been questioned (Luce, 1986; Nissen, 1977), at least when the task is not brightness discrimination. In two SRT and three CRT experiments, we investigated the function that relates reaction time (RT) to stimulus intensity for five levels of luminance covering the entire mesopic range. The psychophysical experiments consisted of simple detection, two-alternative forced choice (2 AFC) with spatial uncertainty, 2 AFC with semantic categorization, and 2 AFC with orientation discrimination. The results of the experiments showed that mean RT increases with task complexity. However, the exponents of the functions relating RT to stimulus intensity were found to be similar in the different experiments. This finding indicates that Piéron’s law holds for CRT as well as for SRT. It describes RT as a power function of stimulus intensity, with similar exponents, regardless of the complexity of the task.     

Turning the gender tables: evidence of students’ awareness of a reversal in gender status between academic and occupational contexts

Social Psychology of Education - This study investigates young people’s awareness of gender differences in achievement and their reversal between educational and occupational contexts. Girls...     

Is job performance independent from career success? A conceptual distinction between competence and agency

Adopting a social approach to social judgment, we conducted five studies to validate a conceptual distinction between agency and competence traits. Studies 1–3 revealed that competence traits (e.g., skillful) are associated with job performance, whereas agentic traits (e.g., ambitious) are associated with career success. Study 4 showed that only agency predicted the amount of money people are likely to earn: the more a given trait was considered as agentic, the more it was associated with high monetary values. Study 5 highlighted the predominance of agency traits over competence traits in the evaluation of an employee applying for a promotion. Nevertheless, participants asserted that competence was the main criterion they used to judge the applicant. Implications of the conceptual distinction between agency and competence for social cognition are discussed.