Dichotomous perception of animal categories in infancy

ABSTRACT

Although there is a wealth of knowledge on categorization early in life, there are still many unanswered questions about the nature of category representation in infancy. For example, it is unclear whether infants are sensitive to boundaries between complex categories, such as types of animals, or whether young infants exhibit such sensitivity without explicit experience in the lab. Using a morphing technique, we linearly altered the category composition of images and measured 6.5-month-olds’ attention to pairs of animal faces that either did or did not cross the categorical boundary, with the stimuli in each pair being equally dissimilar from one another across the two types of image pairs. Results indicated that infants dichotomize the continua between cats and dogs and between cows and otters, but only when the images are presented in their canonical, upright orientations. These findings demonstrate a propensity to dichotomize early in life that could have implications for social categorizations, such as race and gender.     

Communicative intentions in wild chimpanzees: persistence and elaboration in gestural signalling

We examine evidence for communicative intent during conspecific interactions in wild chimpanzees (Budongo Forest, Uganda), focusing on persistence in gestural communication. Previous research indicates that great apes have large gestural repertoires and produce gestural communication in a flexible and intentional manner, including the production of gesture sequences. Although there is a lack of consensus on the form and function of sequences, there is some evidence that sequences are produced when signallers fail to receive any response from a recipient. Here, we provide first systematic evidence for communicative persistence in wild chimpanzees. Rather than examining only the presence or absence of a response, we used the most commonly observed response to assign meanings to gestures and examined sequence production in relation to response congruency. Chimpanzees ceased communication if successful, but persevered when unsuccessful. Chimpanzees repeated gestures when a response partially matched their goal but substituted the original gesture when a response was incongruent. Persistence was also mediated by recipient intent to respond, with more sequences produced within competitive than affiliative contexts. Gestures within sequences were homogenous in semantic meaning and signallers continued until the response matched the assigned meaning of the initial gesture. Gestural sequence production was not primarily affective; gesture intensity (in terms of modality) did not increase within sequences. Chimpanzee gestural sequences emerged to achieve specific outcomes; given variability in recipient behaviour following initial gestures, signallers were flexible in their persistence towards these goals.     

Quality of Reasons and Degrees of Responsibility

Traditionally, theories of moral responsibility feature only the minimally sufficient conditions for moral responsibility. While these theories are well-suited to account for the threshold of responsibility, it’s less clear how they can address questions about the degree to which agents are responsible. One feature that intuitively affects the degree to which agents are morally responsible is how difficult performing a given action is for them. Recently, philosophers have begun to develop accounts of scalar moral responsibility that make use of this notion of difficulty [Coates and Swenson 2013; Nelkin 2016]. In this paper, I argue that these accounts, although innovative, are incomplete. The degree to which agents are morally responsible is determined not only by the difficulties that agents face but also by the quality of the reasons for which they act.     

Characteristics of Individuals Seeking Treatment for Obsessive-Compulsive Disorder

Despite severe functional impairment, only 35% to 40% of individuals with obsessive-compulsive disorder (OCD) seek treatment, and fewer than 10% receive evidence-based treatment. The current study examined the characteristics of 525 individuals who contacted the clinic of the Center for the Treatment and Study of Anxiety at the University of Pennsylvania to inquire about OCD treatment and completed a phone screen. Callers who were deemed appropriate for the clinic (n = 396, 75%) were invited to participate in an in-person intake evaluation. Only 137 (35%) of the eligible individuals completed the intake evaluation (“treatment intake group”) whereas the majority (n = 259, 65%) did not (“phone screen–only group”). Compared to individuals in the phone screen–only group, those in the treatment intake group were younger, less likely to endorse depressed mood, and more likely to have received a diagnosis of OCD, to have previously sought psychological services, and to have taken psychotropic medication. The findings suggest that familiarity with their diagnosis and past contact with mental health professionals enhance openness to explore yet another treatment. In contrast, lack of awareness about the problem and depressed mood may reduce openness to seek treatment.     

Duty orientation: Theoretical development and preliminary construct testing

We develop and test the construct of duty orientation that we propose is valuable to advancing knowledge about ethical behavior in organizations. Duty orientation represents an individual’s volitional orientation to loyally serve and faithfully support other members of the group, to strive and sacrifice to accomplish the tasks and missions of the group, and to honor its codes and principles. We test the construct validity and predictive validity of a measure of duty orientation across five studies and six samples. Consistent with the conceptualization of duty orientation as a malleable construct, we found in separate field studies that duty orientation mediates the relationship between ethical leadership and ethical and unethical behaviors, and between transformational leadership and ethical behavior. In predicting ethical and unethical behavior, duty orientation demonstrated incremental predictive validity beyond the effects of affective organizational commitment, organizational identification, experienced job responsibility, collective self-construal, and organizational values congruence.     

Age-differential effects on updating cue information: Evidence from event-related potentials

Recent models on cognitive aging consider the ability to maintain and update context information to be a key source of age-related impairments in various cognitive tasks (Braver & Barch in Neuroscience & Biobehavioral Reviews, 26: 809–817, 2002). Context updating has been investigated with a modified AX-continuous-performance task by comparing performance and brain activity between context-dependent trials (i.e., correct responses require updating of the preceding cue information) and context-independent trials (i.e., correct responses are independent of cue information). We used an event-related potential (ERP) approach to identify sources of age differences in context processing in the early and late processing of cue information. Our behavioral data showed longer latencies and higher error rates on context-dependent than on context-independent trials for older than for younger adults, suggesting age-related impairments in context updating. The ERP data revealed larger P3b amplitudes for context-dependent than for context-independent trials only in younger adults. In contrast, in older adults, P3b amplitudes were more evenly distributed across the scalp and did not differ between context conditions. Interestingly, older but not younger adults were sensitive to changes of cue identity, as indicated by larger P3b amplitudes on cue-change than on cue-repeat trials, irrespective of the actual context condition. We also found a larger CNV on context-dependent than on context-independent trials, reflecting active maintenance of context information and response preparation. The age-differential effects in the P3b suggest that both younger and older adults were engaged in updating task-relevant information, but relied on different information: Whereas younger participants indeed relied on context cues to update and reconfigure the task settings, older adults relied on changes in cue identity, irrespective of context information.     

Relationships between cognition and literacy in children with attention-deficit/hyperactivity disorder: A systematic review and meta-analysis

Evidence suggests that cognitive and literacy difficulties are common for children with Attention-Deficit/Hyperactivity Disorder (ADHD). The current systematic review and meta-analysis investigated the relationship between cognition and literacy in children with ADHD. Ten thousand and thirty-eight articles were screened against the inclusion criteria and six eligible studies were retained for final review. Where two or more studies used comparable measures of cognition and literacy, a meta-analysis of the relationship between these measures was undertaken. A narrative synthesis of all included studies was also completed. There were medium effect sizes between working memory and aspects of reading, and small effect sizes between processing speed and reading. Inhibition and attention had differential relationships with aspects of literacy with varying effect sizes. This systematic review demonstrates differential relationships between aspects of literacy and cognition in children with ADHD. Further examination of these relationships is warranted to support intervention development.     

Correlates of condom use and condom‐use motivation among young South Africans

A survey of South African secondary school students aged 12–17 years (n = 893) included measures designed to investigate relationships between beliefs about HIV/AIDS, condom use, interpersonal relationships, and two dependent measures: motivation to use condoms and reported condom use. We predicted that motivation would be an important correlate of reported condom use and that traditional cultural beliefs included in social cognition models would predict condom use motivation. Hierarchical multiple regression showed that 10% of the variance in reported condom use was accounted for by condom use motivation and age. Condom self‐efficacy, beliefs about condoms and injunctive norms accounted for much of the variance. Other beliefs included susceptibility to HIV and attribution of HIV to asexual sources such as witchcraft indicating that an expanded model of modifiable cognitions may be optimal when designing HIV interventions among young South Africans.