Effects of reward and nonreward on frustration and attention in attention deficit disorder

The effects of reward schedule (100%, 50%, and 30%) and termination of rewards (extinction) on 30 attention deficit disorder with hyperactivity (ADD-H) and 30 normal children were studied using measures of frustration (speed/strength of lever pulling) and attention (reaction time to a light signal). ADD-Hs pulled harder on the lever than controls during extinction and on the lowest (30%) partial schedule, providing empirical evidence that they respond with greater frustration than normals when expected rewards fail to appear. The groups did not differ on the attentional measure on 100% reward. However, the partial schedules appeared to have an alerting or motivating effect on the controls, so that they responded more quickly and consistently than ADD-Hs on the partial schedules. Findings are discussed with reference to opposing theories regarding the nature of the abnormal response of ADD-Hs to reward.This research was supported by grant MA 11252 from the Medical Research Council of Canada.     

Family Interaction and Individual Psychological Health

Two studies explored the relationships between individual psychological health (PH) status and perceptions of family interaction and family climate variables as perceived by young adults. Psychological health was defined within inter- and intrapersonal domains, represented by social interest and psychological hardiness. Scores on social interest and hardiness instruments were standardized and added to put the construct of psychological health into practice. Family interaction variables were measured with Family Adaptability and Cohesion Evaluation Scales-III (FACES-III), the Children's Report of Parent Behavior Inventory-30 (CRPBI-30), Parent-Adolescent Communication Scale (PAC), Family Satisfaction Scale (FSS), and the Family Environment Scale (FES). Multivariate analyses indicated that PH status was associated with several family variables, with cohesion emerging as a key dimension. Implications for counseling are discussed.     

Negative priming effects that are bigger than a breadbox: Attention to distractors does not eliminate negative priming, it enhances it

In a series of experiments, we examined the effect of requiring subjects to attend to distractors in a test of negative priming. This was accomplished by using a referent size-selection task in which subjects were instructed to name the larger animal and to ignore the smaller animal in a word pair. The result was a quadrupling of the standard negative priming effect, suggesting that negative priming not only occurs for attended distractors, it is actually enhanced. We demonstrated that this enhancement of the effect was not due solely to increased latencies in the referent size-selection task, because neither decreasing base response times in other referent size-selection tasks nor increasing base response times in typical color-selection tasks substantially affected the respective negative priming effects. Although these findings can be accommodated within current theories of negative priming, they challenge the basic assumption that the negative priming effect arises because the critical item was ignored or not attended to on the prime trial.     

Phrasing influences the recognition of melodies

One critical step in the processing of complex auditory information (i.e., language and music) involves organizing such information into hierarchical units, such as phrases. In this study, musically trained and untrained listeners' recognition memory for short, naturalistic melodies varying in their phrase structure was tested. For musically trained subjects, memory for information preceding a phrase boundary was disrupted and memory for information subsequent to a phrase boundary was enhanced relative to memory in similar temporal locations for excerpts not containing a phrase boundary. Musically untrained listeners, in contrast, showed no such differences as a function of the phrasing of the melody. These findings conform with previous results in both psycholinguistics and musical cognition and suggest that the phrase serves as a functional unit in musical processing, guiding the parsing of musical sequences during perception, along with the structuring of memory for musical passages.     

Real-time examinations of lexical processing in aphasics

We argue that the lesion localizing value of disruptions to modular information processing systems emerges most clearly from on-line analyses of processing. In this respect we seek to show that left anterior (but not left posterior) damage causes slowed information access and we discuss the manner in which this slowing might yield some of the specific syntactic limitations charted in Broca's aphasia. The general possibility we raise is that the cortical area implicated in Broca's aphasia is not necessarily the locus of syntactic representations, but rather sustains particular time-based operating characteristics that in turn sustain normal real-time parsing.This research was supported in part by NIH grants NS11408 and NS06209 to Boston University School of Medicine and by the Research Service of the Veterans Administration.     

Vicarious Victims of a Maritime Disaster

A group of 24 cross-channel ferry workers were referred to the Folkestone Mental Health Team in the months following the capsize of the 'Herald of Free Enterprise' at Zeebrugge in March 1987. They presented with symptoms of Post- Traumatic Stress Disorder and severe anxiety about working at sea. 17 had no direct connection with the Zeebrugge disaster, but appeared to be vicarious or peripheral victims. It is recommended that in cases of major transport accidents, off-duty crew members be screened for evidence of post-traumatic stress.     

Exploring Conflict Culture in the Family: Consistency and Continuity of Conflict During Family Meal Discourse

Conflict discourse in the context of everyday activities of families during mealtimes was examined with a view to determining consistency and continuity on two occasions one year apart. In particular, the use of authority, the part played by each member of the family, and the ways in which conflicts were terminated was addressed. Data derived from Jewish families was considered not only to enable comparisons to be made with data derived from the broader community, but to illuminate the issues pertinent to the exploration of conflict within the family. It was observed over a period of time that there was a continuity of conflict culture within each family. Additionally it was found that generally, family conflict interactions terminated in standoffs rather than resorting to full blown conflicts and the outcome was, on the whole, favourable to all parties, with conversations continuing to be pursued without further conflict. In some instances termination of the episode was through an external agent, rather than a family member. The key part that family members play in deflecting conflict, especially the part played by mothers and siblings was noted. The extension of existing conflict coding schema to account for different types of authority moves, so as to discriminate between authority based on status and that which invokes an idea of shared responsibility or a common code of conduct is recommended. A further extension of the coding schema to account for paralinguistic aspects of communication is suggested.     

Phonemic identification in a phoneme monitoring experiment: The variable role of uncertainty about vowel contexts

Subjects monitored for the syllable-initial phonemes /b/ and /s/, as well as for the syllables containing those phonemes, in lists of nonsense syllables. Time to detect /b/ was a function of the amount of uncertainty as to the identity of the vowel following the target consonant; when uncertainty was low, no difference existed between phoneme and syllable monitoring latencies, but when uncertainty was high, syllables were detected faster than phonemes. Time to detect /s/ was independent of uncertainty concerning the accompanying vowel and was always slower than syllable detection. The role of knowledge of contexts in a phoneme-monitoring task as well as the relative availability of phonemic information to the listener in this task are discussed.     

Semantic facilitation across sensory modalities in the processing of individual words and sentences

The effect of semantic priming upon lexical decisions made for words in isolation (Experiment 1) and during sentence comprehension (Experiment 2) was investigated using a cross-modal lexical decision task. In Experiment 1, subjects made lexical decisions to both auditory and visual stimuli. Processing auditorily presented words facilitated subsequent lexical decisions on semantically related visual words. In Experiment 2, subjects comprehended auditorily presented sentences while simultaneously making lexical decisions for visually presented stimuli. Lexical decisions were facilitated when a visual word appeared immediately following a related word in the sentential material. Lexical decisions were also facilitated when the visual word appeared three syllables following closure of the clause containing the related material. Arguments are made for autonomy of semantic priming during sentence comprehension.