Frege's ‘On the Concept of Number’ (1891) – an unnoticed publication

A short piece by Frege, heretofore overlooked, containing a précis of his views on the concept of number, is presented, after some very brief questions about Frege's possible involvement in the wider intellectual milieu.     

Anosognosia for Memory Impairment in Addiction: Insights from Neuroimaging and Neuropsychological Assessment of Metamemory

In addiction, notably Alcohol Use Disorder (AUD), patients often have a tendency to fail to acknowledge the reality of the disease and to minimize the physical, psychological, and social difficulties attendant to chronic alcohol consumption. This lack of awareness can reduce the chances of initiating and maintaining sobriety. Presented here is a model focusing on compromised awareness in individuals with AUD of mild to moderate cognitive deficits, in particular, for episodic memory impairment—the ability to learn new information, such as recent personal experiences. Early in abstinence, alcoholics can be unaware of their memory deficits and overestimate their mnemonic capacities, which can be investigated with metamemory paradigms. Relevant neuropsychological and neuroimaging results considered suggest that the alcoholics’ impairment of awareness of their attenuated memory function can be a clinical manifestation explained mechanistically by neurobiological factors, including compromise of brain systems that result in a mild form of mnemonic anosognosia. Specifically, unawareness of memory impairment in AUD may result from a lack of personal knowledge updating attributable to damage in brain regions or connections supporting conscious recollection in episodic memory. Likely candidates are posterior parietal and medial frontal regions known to be integral part of the Default Mode Network (DMN) and the insula leading to an impaired switching mechanism between the DMN and the Central-Executive Control (i.e., Lateral Prefronto-Parietal) Network. The cognitive concepts and neural substrates noted for addictive disorders may also be relevant for problems in self-identification of functional impairment resulting from injury following war-related blast, sport-related concussion, and insidiously occurring dementia.     

Resurgence following differential reinforcement of alternative behavior implemented with and without extinction

In the clinic, differential reinforcement of alternative behavior (DRA) often involves programming extinction for destructive behavior while reinforcing an alternative form of communication (e.g., a functional communication response); however, implementing extinction can be unsafe or impractical under some circumstances. Quantitative theories of resurgence (i.e., Behavioral Momentum Theory and Resurgence as Choice) predict differences in the efficacy of treatments that do and do not involve extinction of target responding when reinforcement conditions maintaining alternative responding worsen. We tested these predictions by examining resurgence following two DRA conditions in which we equated rates of reinforcement. In DRA without extinction, target and alternative behavior produced reinforcement. In DRA with extinction plus noncontingent reinforcement, only alternative behavior produced reinforcement. We conducted this study in a reverse-translation sequence, first with participants who engaged in destructive behavior (Experiment 1) and then in a laboratory setting with rats (Experiment 2). Across both experiments, we observed proportionally lower levels of target responding during and following the DRA condition that arranged extinction for the target response. However, levels of resurgence were similar following both arrangements.     

On the Relationship Between Attitude Involvement and Attitude Accessibility: Toward a Cognitive-Motivational Model of Political Information Processing

A model of the relationship between attitude involvement and attitude accessibilitywas developed and tested. The model specifies that attitude involvement leads to selective(biased) issue-related information-gathering strategies, which in turn produce extreme andunivalent (unambivalent) attitudes. Finally, attitudes associated with univalent and extremeunderlying structures should occasion relatively little decision conflict and thus should be highlyaccessible. Questionnaire response data gathered in a national telephone survey and from twosamples of undergraduates revealed that both attitude extremity and attitude ambivalence onselected political issues mediated the relationship between attitude involvement and attitudeaccessibility. Some findings indicated that selective processing mediated the relationshipbetween attitude involvement and attitude extremity and ambivalence. Discussion focuses on theprocesses linking involvement to accessibility, the factors that moderate theambivalence-accessibility relationship, and the relevance of the model to media-based primingeffects and tothe nature of public opinion and the survey response.     

Metachromatic leukodystrophy and nonverbal learning disability: neuropsychological and neuroradiological findings in heterozygous carriers.

Metachromatic leukodystrophy (MLD) is an autosomal recessive neurodegenerative disorder due to deficiency of the enzyme arylsulfatase A that leads to progressive, diffuse demyelination. The syndrome of nonverbal learning disability has been attributed to white matter abnormality and has been reported in children with this disorder and in some healthy family member carriers of gene. We examined the neuropsychologic profiles and MRIs of eight members of the family of a 7-year-old girl with this disease, all of whom were heterozygous carriers of the mutation and five of whom were also carriers of the MLD pseudodeficiency gene. All had low normal levels of arylsulfatase A, and seven of the eight had average or better profiles across all assessed neuropsychological domains. The patient's younger sister had a profile with features of the syndrome of nonverbal learning disability despite a normal MRI, whereas two members with minor white matter findings did not. This family does not provide evidence for the syndrome of nonverbal learning disability in heterozygous carriers of the gene for MLD, even when associated with the MLD pseudodeficiency gene.     

Completeness of instruction and strategy transfer

Three experiments assessed the effects on strategy transfer of supplements to keyword method instruction. One supplement consisted of more comprehensive instructions regarding how, when, why, and where to apply the strategy. A second supplement involved additional practice with the strategy during instruction. The combined effects of more elaborate directions and practice were also examined. With grade-school children, the supplements generally increased transfer of the keyword strategy, but transfer was most successful when training included comprehensive information about the strategy. In contrast, with adults high transfer was obtained regardless of keyword instructional variation. The results are related to other developmental data and are particularly germane to claims that with more complete instruction younger children are capable of intellectual feats carried out by older individuals given minimal prompting.     

Gender,gender role,and body image

The relationship between gender role and body image was examined in this research. Females and males who differed in their gender roles (i.e., masculine, feminine, androgynous, or undifferentiated) completed the Body-Self Relations Questionnaire (B. A. Winstead & T. F. Cash, Reliability and Validity of the Body-Self Questionnaire: A New Measure of Body Image, paper presented at the meeting of the Southeastern Psychological Association, New Orleans, Louisiana, 1984) and a measure of self-esteem. Results indicated that feminine females evaluated their physical appearance less favorably than androgynous females, although physical appearance was equally important to both groups. The importance of the masculine component of gender role was reflected in the favorable body-image ratings of androgynous and masculine females in all domains (i.e., physical appearance, physical fitness, and physical health), and in the unfavorable ratings of feminine males in the physical fitness domain. Regression analyses to predict body-image ratings indicated that while self-esteem was an important predictor, it did not account for the relationships between gender, gender role, and body image. Implications of the findings for future research on the relationships between gender role, body image, and indices of mental health are discussed.The authors would like to thank the consulting editor for her invaluable comments on earlier drafts of this article.