Ipsi-and bilateral interactions in taste

In two experiments, the integration over spatial extent in taste was investigated for threshold sensitivity to NaCl and for suprathreshold intensity perception of saltiness. The area of stimulation was doubled by adding either an ipsilateral or a bilateral stimulus. The two stimuli could be of equal or unequal intensity. The data showed that at threshold level a probability summation model applied to all bilateral and most of the ipsilateral stimulus combinations. Probability summation failed to predict detection probability when two stimuli with different intensities were presented at the same tongue side. For suprathreshold stimuli, the magnitude of the saltiness sensation as estimated by a line-length method depended on the level of stimulation. The possible peripheral interaction mechanisms and central factors contributing to the taste response were discussed.     

How do applicants fake? A response process model of faking on multidimensional forced-choice personality assessments

Faking on personality assessments remains an unsolved issue, raising major concerns regarding their validity and fairness. Although there is a large body of quantitative research investigating the response process of faking on personality assessments, for both rating scales (RS) and multidimensional forced choice (MFC), only a few studies have yet qualitatively investigated the faking cognitions when responding to MFC in a high-stakes context (e.g., Sass et al., 2020). Yet, it could be argued that only when we have a process model that adequately describes the response decisions in high stakes, can we begin to extract valid and useful information from assessments. Thus, this qualitative study investigated the faking cognitions when responding to MFC personality assessment in a high-stakes context. Through cognitive interviews with N = 32 participants, we explored and identified factors influencing the test-takers' decisions regarding specific items and blocks, and factors influencing the willingness to engage in faking in general. Based on these findings, we propose a new response process model of faking forced-choice items, the Activate-Rank-Edit-Submit (A-R-E-S) model. We also make four recommendations for practice of high-stakes assessments using MFC.     

Unique Associations between Childhood Temperament Characteristics and Subsequent Psychopathology Symptom Trajectories from Childhood to Early Adolescence

Existing research suggests that temperamental traits that emerge early in childhood may have utility for early detection and intervention for common mental disorders. The present study examined the unique relationships between the temperament characteristics of reactivity, approach-sociability, and persistence in early childhood and subsequent symptom trajectories of psychopathology (depression, anxiety, conduct disorder, and attention-deficit hyperactivity disorder; ADHD) from childhood to early adolescence. Data were from the first five waves of the older cohort from the Longitudinal Study of Australian Children (n = 4983; 51.2% male), which spanned ages 4–5 to 12–13. Multivariate ordinal and logistic regressions examined whether parent-reported child temperament characteristics at age 4–5 predicted the study child’s subsequent symptom trajectories for each domain of psychopathology (derived using latent class growth analyses), after controlling for other presenting symptoms. Temperament characteristics differentially predicted the symptom trajectories for depression, anxiety, conduct disorder, and ADHD: Higher levels of reactivity uniquely predicted higher symptom trajectories for all 4 domains; higher levels of approach-sociability predicted higher trajectories of conduct disorder and ADHD, but lower trajectories of anxiety; and higher levels of persistence were related to lower trajectories of conduct disorder and ADHD. These findings suggest that temperament is an early identifiable risk factor for the development of psychopathology, and that identification and timely interventions for children with highly reactive temperaments in particular could prevent later mental health problems.     

The influence of social identity on value perceptions and intention

Despite much research on consumers' brand identification, researchers remain divided regarding the conceptualization of the dimensions underlying social identity and how these dimensions impact marketing outcome variables. Further, previous studies have failed to examine the underlying psychological process driving this effect. The current research is the first to assess the importance of affective social identity as the mediator through which cognitive social identity impacts consumers' purchase intentions by ways of emotional and social value. Results show that affective social identity mediates the relationship between cognitive social identity and emotional value, where affect is the main driver in the formation of purchase intention. This study highlights the need to model cognitive and affective social identity separately and provides insight into how consumers' social identification influences their perceptions of identity‐linked products. Copyright © 2016 John Wiley & Sons, Ltd.     

Effects of repetitive stress during the acute phase of Trypanosoma cruzi infection on chronic Chagas' disease in rats

The effect of repetitive stress during acute infection with Trypanosoma cruzi (T. cruzi) on the chronic phase of ensuing Chagas' disease was the focus of this investigation. The aim of this study was to evaluate in Wistar rats the influence of repetitive stress during the acute phase of infection (7 days) with the Y strain of T. cruzi on the chronic phase of the infection (at 180 days). Exposure to ether vapor for 1 min twice a day was used as a stressor. Repetitive stress enhanced the number of circulating parasites and cardiac tissue disorganization, from a moderate to a severe diffuse mononuclear inflammatory process and the presence of amastigote burden in the cardiac fibers. Immunological parameters revealed that repetitive stress triggered a reduced concanavalin A induced splenocyte proliferation in vitro with major effects on the late chronic phase. Serum interleukin-12 concentration decreased in both stressed and infected rats in the early phase of infection although it was higher on 180 days post-infection. These results suggest that repetitive stress can markedly impair the host's immune system and enhance the pathological process during the chronic phase of Chagas' disease.     

Cultural Background and Individualistic–Collectivistic Values in Relation to Similarity, Perspective Taking, and Empathy

A path model testing antecedents and consequences of perceived similarity was examined for Asian and European Australian participants ( N  = 240). Cultural background and values were measured, and participants read scenarios describing a target in distress acting according to individualistic or collectivistic values. Consistent with past research, feeling similar to the target was linked to perspective taking and empathy. Moreover, Asian participants were more collectivistic, and collectivistic values were linked to higher empathy. In the present data, however, both endorsed higher levels of collectivism than individualism; individualism scores were equal; and the two values were positively correlated. Moreover, neither cultural background nor values were consistently linked to similarity. Implications are discussed for research on cultural background, values, and social interactions.     

Mother–child and metapelet–child touch behavior with three‐year‐old kibbutz children in two contexts

The frequency and function of self‐touch and of touching another was studied among 32 three‐year‐old kibbutz children, their mothers, and their metaplot [caretakers; singular: metapelet] in two contexts: coconstruction of a narrative with Duplo toys, and coconstruction of a narrative with an emotion‐evoking picture book without text. Self‐touch, mainly fidgeting, was more frequent for children during the task with the picture book and more frequent for adults during the task with the Duplo toys. Mothers and children touched each other more often than metaplot and children. Adults' touches of the children were perceived as either expressions of affection or as acts of grooming and were task‐related. The children's touching of the adults was mainly task‐related. It appears that self‐touch is for children and adults alike a mode of self‐regulation of mild stress and that touching the other has a wide range of functions, especially in intimate relationships. ©2003 Michigan Association for Infant Mental Health.     

What to do and how to do it: sequence learning of action effects and transformation rules

Many goal-oriented actions, for example in tool use, can be characterized by the involvement of two components: The effect that the acting person wants to achieve and the transformation rule that defines the relationship between a bodily movement and the associated action effect. Both in conjunction specify the concrete action that has to be executed. In our experiments, we utilized a sequence learning paradigm to investigate whether these components are represented separately or are bound together to form a more holistic representation of the action. Participants switched between different transformation rules to achieve certain action effects. In one group, there was a fixed sequence of action effects, with randomly varying transformation rules. In the other group, the sequence of transformation rules was fixed, whereas the action effects were randomly varying. Results indicate that both kinds of sequences can be learned and provide evidence for the notion that transformation rules and action effects are represented separately.