Semantic Compositionality and Truth-Conditional Content

It is widely held that hearers grasp an utterance's truth conditions by assigning contents to the linguistic expressions used, and combining these contents according to semantic composition rules. To preserve compositionality of truth-conditional content while accounting for context-sensitivity that is not traceable to overt linguistic form, semanticists posit covert linguistic structure. The strongest justification for this approach is the allegedly unconstrained nature of the alternative, whereby a process of 'free pragmatic enrichment' supplies constituents of content that are not traceable to (overt or covert) encoded meaning. This paper argues that free enrichment is tightly constrained by purely pragmatic factors, thus undermining the motivation for semantic compositionality.     

A randomised controlled trial of the effectiveness of writing as a self-help intervention for traumatic injury patients at risk of developing post-traumatic stress disorder

The study investigated the effects of writing and self-help information on severity of psychological symptoms in traumatic injury patients at risk for developing post-traumatic stress disorder (PTSD). Patients attending Accident and Emergency (A & E), were screened for Acute Stress Disorder and randomised to an information control group (n = 36) or a writing and information group (n = 31). Participants in both groups received an information booklet one-month post-injury. Participants in the writing group also wrote about emotional aspects of their trauma during three 20-min sessions, five to six weeks post-injury. Psychological assessments were completed within one month and at three and six months post-injury. There were significant improvements on measures of anxiety, depression and PTSD over time. Differences between groups on these measures were not statistically significant. However, subjective ratings of the usefulness of writing were high. In conclusion, the results do not currently support the use of writing as a targeted early intervention technique for traumatic injury patients at risk of developing PTSD.     

Safety behaviours preserve threat beliefs: Protection from extinction of human fear conditioning by an avoidance response

A laboratory autonomic conditioning procedure was used to establish fear conditioning in human participants by pairing neutral stimuli with electric shock. Participants were also trained to make a button-press response to avoid shock. A target fear stimulus was then extinguished by presenting it without shock. The experimental group was given the opportunity to make the avoidance response during extinction whereas the control group was not. When the fear stimulus was tested without the response available, the control group showed normal extinction of both shock expectancy ratings and skin conductance responses, but the experimental group showed “protection from extinction”: they continued to give high expectancy ratings and strong skin conductance responses. We interpret this effect as analogous to the role of within-situation safety behaviours in preserving threat beliefs during exposure therapy for anxiety disorders. The results support a cognitive account of learning and anxiety. The procedure provides a potential laboratory model for further examination of the cognitive and neural mechanisms underlying anxiety and its reduction.     

Repetition blindness: an emergent property of inter-item competition

Repeating an item in a brief or rapid display usually produces faster or more accurate identification of the item (repetition priming), but sometimes produces the opposite effect (repetition blindness). We present a theory of short-term repetition effects, the competition hypothesis, which explains these paradoxical outcomes. The central tenet of the theory is that repetition produces a representation with a higher signal-to-noise ratio but also produces a disadvantage in the representation’s ability to compete with other items for access to awareness. A computational implementation of the competition hypothesis was developed to simulate standard findings in the RB literature and to generate novel predictions which were then tested in three experiments. Results from these experiments suggest that repetition effects emerge from competitive interactions between items and that these influences extend to adjacent, nonrepeated items in the display. The results also present challenges to existing theories of short-term repetition effects.     

Concurrent associations between anxiety sensitivity and perceived health and health disability among young adult daily smokers

The aim of this investigation was to evaluate the incremental validity of anxiety sensitivity (fear of arousal-related physical and psychological sensations) relative to health factors (smoking variables, alcohol use and exercise level), in predicting perceived health and disability among a sample of 225 young adult daily smokers (102 females; M(age) = 23.9 years, SD = 8.8). Consistent with prediction, anxiety sensitivity, relative to smoking-relevant variables, alcohol consumption (a single frequency by quantity composite) and exercise activity, predicted lower perceived general health and impairments in mental health and social functioning; no incremental effects were evident for anxiety sensitivity for predicting impairments in physical functioning, role functioning, or increased healthcare usage. These findings are discussed with respect to better understanding cognitive factors that affect perceptions of health status and functioning among daily smokers.     

Examining Subtypes of Behavior Problems Among 3-Year-Old Children,Part I: Investigating Validity of Subtypes and Biological Risk-Factors

This study examined 3-year-old children who were classified as hyperactive (HYP), oppositional-defiant (OD), hyperactive and oppositional defiant (HYP/OD), and non-problem based on mothers' reports of behavior. Using fathers,' teachers,' and observers' ratings of children's behavior, concurrent validity was excellent for the HYP/OD group, moderate for the HYP group, and poor for the OD group. As predicted, both the HYP/OD and HYP groups reported more prenatal/perinatal birth complications and a greater family history of hyperactivity than did non-problem children. Furthermore, the HYP/OD group showed a greater family history of conduct disorder and oppositional defiant disorder (ODD) symptoms than did non-problem children; however, the HYP group also showed a greater family history of ODD than did non-problem children. Results suggest that as early as age 3, these behavior subtypes appear to be linked to biologically-based risk-factors in ways that are consistent with theories of the development of ADHD.     

Stress and smoking in adolescence: a test of directional hypotheses.

The authors conducted a comparative test of the hypotheses that (a) stress is an etiological factor for smoking and (b) cigarette smoking causes increases in stress (A. C. Parrott, 1999). Participants were a sample of 1,364 adolescents, initially surveyed at mean age 12.4 years and followed at 3 yearly intervals. Measures of negative affect, negative life events, and cigarette smoking were obtained at all 4 assessments. Latent growth modeling showed negative affect was related to increase in smoking over time; there was no path from initial smoking to change in negative affect. Comparable results were found for negative life events, with no evidence for reverse causation. Results are discussed with respect to theoretical models of nicotine effects and implications for prevention.     

A META-ANALYSIS ON THE MALLEABILITY OF AUTOMATIC GENDER STEREOTYPES

This meta-analytic review examined the efficacy of interventions aimed at reducing automatic gender stereotypes. Such interventions included attentional distraction, salience of within-category heterogeneity, and stereotype suppression. A small but significant main effect ( g  = .32) suggests that these interventions are successful but that their scope is limited. The intervention main effect was moderated by publication status, sample nationality, and intervention type. The meta-analytic findings suggest several issues worthy of further investigation, such as whether (a) other categories of intervention not yet identified or tested could be more effective, (b) suppression necessarily produces ironic effects in automatic stereotyping, (c) various indirect measures are differentially sensitive to stereotype change, and (d) automatic stereotypes about men differ in their malleability from those about women.     

The relationship between speed of information processing and cognitive ability

Speed of information processing as measured by various reaction time and inspection tasks has been shown to correlate with psychometric intelligence, and it has been suggested that general intelligence (g) is determined to some degree by the speed that information is processed. If this is so, then various measures of speed of information processing should correlate substantially with each other, and each should also correlate with a wide range of psychometric tests that load on g. Alternatively, intelligence may be considered to be a multi-faceted complex of partially related abilities with specific abilities being dependent upon specific cognitive processes. If this is the case, it should be possible to discover independent cognitive processes, some of which correlate with one facet or broad ability and some with another. This paper presents three experiments in which the relationship between intellectual ability and four speed of information processing measures was examined. These were rate of memory scanning, rate of retrieval of information from long term memory, speed of stimulus-response mapping and inspection time (IT). Results showed that correlations between IT and most reaction time measures of speed of information processing were low, and that correlations between different versions of IT were negligible. In addition, some cognitive tasks with verbal material (memory scanning rate for digits and Posner letter matching IT) correlated most substantially with Verbal Reasoning whereas non-verbal (two-line) IT consistently correlated with tests loading on g. It was thus suggested that while non-verbal IT may be a measure of a perceptual speed attribute that contributes to mental functioning, other “speed of information processing” parameters may be more specific to a subset of abilities.