The Role of the Hippocampus in Trace Conditioning: Temporal Discontinuity or Task Difficulty?

It is well established that the hippocampal formation is critically involved in the acquisition of trace memories, a paradigm in which the conditioned (CS) and unconditioned stimuli (US) are separated by a temporal gap (Solomon et al., 1986). The structure is reportedly not critical for the acquisition of delay memories, where the CS and the US overlap in time (Berger & Orr, 1983; Schmaltz & Theios, 1972). Based on these results, it is often stated that the hippocampus is involved in "filling the gap" or otherwise associating the two stimuli in time. However, in addition to the presence of a temporal gap, there are other differences between trace and delay conditioning. The most apparent difference is that animals require many more trials to learn the trace task, and thus it is inherently more difficult than the delay task. Here, we tested whether the hippocampus was critically involved in delay conditioning, if it was rendered more difficult such that the rate of acquisition was shifted to be analogous to trace conditioning. Groups of rats received excitotoxic lesions to the hippocampus, sham lesions or were left intact. Using the same interstimulus intervals (ISI), control animals required more trials to acquire the trace than the delay task. As predicted, animals with hippocampal lesions were impaired during trace conditioning but not delay conditioning. However, when the delay task was rendered more difficult by extending the ISI (a long delay task), animals with hippocampal lesions were impaired. In addition, once the lesioned animal learned the association between the CS and the US during delay conditioning, it could learn and perform the trace CR. Thus, the role of the hippocampus in classical conditioning is not limited to learning about discontiguous events in time and space; rather the structure can become engaged simply as a function of task difficulty.     

The effects of collaboration and punishment on prospective memory performance in a group setting

Remembering to perform a delayed intention is termed prospective memory (PM). Often delayed intentions are shared by more than one person; however, there is a dearth of studies examining PM in social settings. We aimed to investigate whether the potential consequences of one's behavior across diverse group settings influence PM performance in event‐ and time‐based tasks. A total of 207 participants were randomly allocated to either an individual, collaborative, or collaborative plus penalty motivation condition and were tested in a 2‐ or 3‐person setting. For the time‐based PM task, participants responded less timely in the individual motivation condition, whereas there was no difference between the collaborative motivation conditions. No significant effects were found for motivation condition on the event‐based task or for group size on PM performance. Analyses of ongoing task performance revealed that participants' attention allocation policies change depending on how individuals prioritize the ongoing and PM tasks.     

Toleration as the Balance Between Liberty and Security

The Journal of Ethics - Traditionally, an adequate strategy to deal with the tension between liberty and security has been toleration, for the latter allows the maximization of individual liberty...     

Food for Boys and Food for Girls: Do Preschool Children Hold Gender Stereotypes about Food?

Sex Roles - Family meals are occasions for socializing children to gender roles and the symbolic meaning of food and eating. One of the relevant symbolic meaning of food concerns its gender...     

Lay theories and ageist attitudes at work: Essentialist beliefs about cognitive aging,fixed mindsets,and cyclical perception of time are linked to ageist attitudes toward older workers

To resolve the problem of ageist attitudes in organizational contexts, the psychological processes that contribute to their endorsement must be investigated. We suggest that lay theories of aging (essentialist beliefs about cognitive aging, EBCA), fixed versus growth mindsets, and lay theories of time (LTT, perceptions of time as change versus. repetition) represent a set of beliefs linked to ageist attitudes toward older workers. We also propose that relationships between these beliefs and ageism are mediated by stereotypical perceptions of older workers. In a pilot study, we constructed a measure of ageist attitudes toward older workers (AATOW). In the main study, we surveyed 166 younger workers (18–30 years old, employed full-time), measuring EBCA, mindsets, LTT, age-related stereotypes, and AATOW. The results demonstrated that there were significant relationships between EBCA, fixed mindset, LTT, and ageist attitudes. The relationships between EBCA and ageism, and mindsets and ageism were mediated by perceptions of older workers as not adaptable, while the relationship between LTT and ageism was not mediated by age-related stereotypes. Implications for organizational efforts to nurture an age-inclusive intergenerational workforce are discussed.     

Identification with all humanity—A test of the factorial structure and measurement invariance of the scale in five countries

Identification with all humanity measured as an individual characteristic is an important factor related to social and international relations, such as concern for global issues and human rights, prosocial attitudes, intergroup forgiveness, attitudes toward immigrants, solving global problems, reactions to hate crimes and dehumanisation. We examine the factorial structure, psychometric properties and measurement invariance of the Identification with All Humanity (IWAH) scale in student samples from five countries (the United States, Poland, France, Mexico and Chile; N = 1930). Separate confirmatory factor analyses (CFAs) for each country showed a second-order model of one superordinate factor with two subfactors. The cross-country validation of the scale, based on multigroup CFA, confirmed configural and metric invariance between countries for raw scores, and full metric invariance for “pure” scores. This study showed that the IWAH scale can be successfully used for cross-country research and the results from different countries can be compared and integrated.     

From ‘Polytheists’ to ‘Partners in the Nation’: Islamist Attitudes Towards Coptic Egyptians in Post-revolutionary Egypt (2011–2013)

In the aftermath of the Arab Spring, Islamist and Salafi organizations, some of them with a violent past, emerged as political actors and displayed a consistent effort to appear as serious and inclusive political contenders. This article studies the attitudes of actors such as the Salafi Nur Party and al-Gamā?a al-Islāmiyya towards Coptic Egyptians in the post-revolutionary phase (2011–2013). It offers a perspective on how these actors navigated between the new political realities and their ideological positions. It argues that Islamist perceptions of the Copts have changed in response to the actions of the latter and that this is pivotal for understanding political attitudes, which seemed at times both moderate and dogmatic, volatile and contradictory. I therefore aim to go beyond the idea of ‘the Copts’ as a silent and homogenous minority and instead integrate the new form of Coptic activism which became visible and vocal after 2011. This approach helps towards a better understanding of how ‘the Copts’ appeared simultaneously in Salafi political discourses as useful political tools, infidels, enemies and equal citizens.     

Binge drinking among young adults in Israel: application of the theory of planned behavior

Binge drinking is common among young people, and is an area of concern in many countries worldwide. Israel has seen a steady increase in binge drinking behaviors in recent years among youth and young adults. Using the Theory of Planned Behavior (TPB) as a guiding theoretical framework, this study examines whether attitudes, subjective norms, perceived behavioral control and intention to engage in binge drinking are correlated with individual participation in binge drinking among young adults aged 18–35 in Israel. Participants (n = 213) completed a cross-sectional survey that included measures of the TPB and binge drinking. Correlations between the TPB variables were conducted and multiple and logistic regression models were calculated to predict binge drinking intention and behavior. Findings show that 38% of the sample reported engaging in binge drinking activities in the past 30 days, and that TPB variables significantly predicted both intent to engage in binge drinking and the behavior itself (explaining 68 and 45% of the variance, respectively). These findings enable us to better understand some of the motivations young people may have for engaging in binge drinking. Results and implications for future education and prevention efforts, research and policy are therefore discussed within a social context.     

The roles of chronological age and time perspective in memory positivity

The observation that older adults show enhanced cognition for emotionally positive information has been labeled the positivity effect (Reed, Chan, & Mikels, 2014). According to the Socioemotional Selectivity Theory (SST, Carstensen, 1991), a prominent lifespan development theory, cognition is strongly influenced by motivational goals, and these goals are impacted by subjective time perspective. Although the positivity effect is most commonly observed in older adults, as age usually co-varies with time perspective, the SST posits that time perspective, not age, is the key explanatory factor of positivity. We examined the effects of these predictors on positivity in an episodic memory task in younger and older adults and found that age, not time perspective, was a key predictor of memory positivity. Our results add to the growing literature that challenge the notion that time perspective is the driving force behind age-related differences in emotional processing and functioning.