Patterns of comprehension and production of nouns and verbs in agrammatism: implications for lexical organization

This study examined the relationship between verb retrieval and verb-argument-structure properties in seven agrammatic aphasic patients using tasks requiring access to the verb's lexicon for both comprehension- and productionlike processes. Results showed intact comprehension of both nouns and verbs and noun naming, but impaired naming of verbs. Subjects also demonstrated near-normal performance on a grammaticality judgment task involving verb-argument-structure violations but were impaired in categorizing verbs by type (based on number of obligatory arguments). In both naming and categorization conditions, a hierarchy of verb difficulty emerged. Subjects were more accurate in naming/categorizing one-place verbs than two-place verbs and more accurate in naming/categorizing two-place verbs than three-place verbs. The pattern of selective impairment in lexical access/retrieval supports the hypothesis that one dimension of normal lexical organization is by form class. The results also suggest that no necessary relationship exists between production difficulties and comprehension of nouns/verbs in agrammatism. Further, the performance pattern noted supports the claim that verb-argument-structure properties, an important component of the verb lexicon, influence verb production at the single-word and at the sentence level. Subjects' performance on different tasks suggests that the locus of breakdown in the verb-retrieval processes for productionlike tasks may be in accessing information at the lemma level of representation as per Bock's model (1995) of sentence production.     

How the quality of third parties' settlement solutions is affected by the relationship between negotiators

Observers watched videotapes of people negotiating. In half of the videotapes, the negotiators had a negative relationship; in the other half, the negotiators had a positive relationship. Some observers believed that the relationship was a genuine reflection of how the parties felt about one another; others were told that the behavior of negotiators was strategic (i.e., used by parties to gain advantage). Following the tape, observers recommended a settlement. Observers' suggestions were most efficient when the negotiators' relationship was positive and genuine; observers proposed significantly worse solutions when negotiators' relationships were negative and genuine. The authors advise mediators to focus on the issues rather than the emotional tone and to avoid the correspondence bias when observing conflicts among parties with negative relationships.     

Biology and pathobiology of neuronal development

Differentiation of neurons within the central nervous system occurs by the combined effects of intrinsic genetic programs and epigenetic stimuli. Disorders causing mental retardation and other abnormalities of higher cortical function arise by disturbances of the normal developmental sequence. MRDD Research Reviews 6:41-46, 2000.     

Choice and self-expression: a cultural analysis of variety-seeking

Three studies examined whether the tendency to seek variety in choices depends in part on cultural assumptions of choice and uniqueness. Study 1 showed that people from different cultures where different assumptions of choice and uniqueness dominate show different levels of variety in their choice rule use. Study 2 primed participants with magazine ads highlighting different representations of uniqueness dominant in individualist versus collectivist cultures to show the influence of cultural meanings of uniqueness on the variety-seeking tendency. Study 3 manipulated the motivation to display variety to demonstrate that variety-seeking in the United States partly hinges on cultural meanings of choice as self-expression. Variety-seeking in choice rule use was eliminated when participants had the chance to self-express through choice listing. The research illustrates the role of cultural assumptions in the variety-seeking tendency.     

A Monte Carlo evaluation of tests for comparing dependent correlations

The authors conducted a Monte Carlo simulation of 8 statistical tests for comparing dependent zero-order correlations. In particular, they evaluated the Type I error rates and power of a number of test statistics for sample sizes (Ns) of 20, 50, 100, and 300 under 3 different population distributions (normal, uniform, and exponential). For the Type I error rate analyses, the authors evaluated 3 different magnitudes of the predictor-criterion correlations (rho(y,x1) = rho(y,x2) = .1, .4, and .7). For the power analyses, they examined 3 different effect sizes or magnitudes of discrepancy between rho(y,x1) and rho(y,x2) (values of .1, .3, and .6). They conducted all of the simulations at 3 different levels of predictor intercorrelation (rho(x1,x2) = .1, .3, and .6). The results indicated that both Type I error rate and power depend not only on sample size and population distribution, but also on (a) the predictor intercorrelation and (b) the effect size (for power) or the magnitude of the predictor-criterion correlations (for Type I error rate). When the authors considered Type I error rate and power simultaneously, the findings suggested that O. J. Dunn and V. A. Clark's (1969) z and E. J. Williams's (1959) t have the best overall statistical properties. The findings extend and refine previous simulation research and as such, should have greater utility for applied researchers.     

Do dispositional attributions regarding peer endorsers influence product evaluations?

The effect of a peer endorsement advertisement on research participants' attitudes toward the advertised product was examined. An advertisement for a Seiko watch and a questionnaire were administered to participants. The degree of dispositional attributions regarding the endorser's motivation and participants' subsequent attitudes associated with the Seiko watch were measured. In addition, other factors that might affect product evaluation were measured. Whether product evaluation could be accounted for by correspondence bias was investigated. The results showed that the degree of dispositional attributions correlated with product evaluations. There was no correspondence bias. Possible causes for the lack of correspondence bias are discussed and a model suggesting factors accounting for participants' product evaluations is presented.     

Relationships between adult attachment representations and family ritual quality: a prospective, longitudinal study

Meaningful family rituals have been associated with positive outcomes for families and children. No studies, however, have investigated predictors of family ritual quality, the identification of which would be important for understanding why some families create and enact meaningful family rituals while others lack rituals or have problematic rituals. We propose that adult attachment security may be an important predictor of family ritual quality because family rituals may provide a sense of stability and cohesiveness for the family. The purpose of this study was to examine relationships between adult attachment representations and the quality of family rituals, using a prospective, longitudinal design. Prior to the birth of their first child, 125 couples completed the Adult Attachment Interview, and a subsample of 70 mothers and 62 fathers completed the Family Rituals Questionnaire when their first child was 7 years old. Different patterns of relationships between attachment representations and family rituals were found for mothers and fathers. Maternal Insecure Attachment was associated with higher routinization of family rituals. Being in a couple with mixed attachment classifications (e.g., one Secure partner and one Insecure partner) was related to a pattern of low routinization and low meaning for family rituals. The results of this study are interpreted in terms of two patterns of rituals that have been described by clinicians--rigid ritualization and underritualization, and suggestions for working with these ritual patterns in families with Insecure attachment are provided.     

Examining culturally based variables associated with ethnicity: influences on credibility perceptions of empirically supported interventions

Treatment rationales for 2 widely used and empirically supported interventions, cognitive therapy (CT) and time-limited dynamic psychotherapy (TLDP), were examined for their perceived credibility among 136 Asian American college students. This study conducted a comprehensive analysis of culturally based variables (often assumed to underlie ethnicity) and their related effects on credibility perceptions. Variables assessed included cultural identity, self-construals, values, and mental health beliefs. Participants were randomly assigned to read either a CT or TLDP treatment rationale for depression and then rated the credibility of the interventions. Results indicated that cultural identity and self-construals moderated credibility ratings across CT and TLDP rationales. Findings underscore the importance of moving beyond ethnic group analyses to the examination of specific culturally based variables.     

It's about timing and change: pubertal transition effects on symptoms of major depression among African American youths

Effects of early physical maturation and accelerated pubertal changes on symptoms of major depression were examined in 639 African American children. Three rival hypotheses, early timing, off-time, and stressful change, were tested using 2 waves of data (mean ages = 11 and 13 years). The pubertal effect operates differently according to children's gender and age. For girls, early maturation was consistently associated with elevated levels of depressive symptoms. For boys, early maturers manifested elevated levels of depression only at age 11, but these symptoms subsided by age 13. Boys who experienced accelerated pubertal growth over time displayed elevated symptom levels. Results support the early timing hypothesis for girls and the stressful change hypothesis for boys. Time at assessment is critical when examining boys' pubertal transition.