Is Structure Dependence an Innate Constraint? New Experimental Evidence From Children's Complex‐Question Production

According to Crain and Nakayama (1987) , when forming complex yes/no questions, children do not make errors such as Is the boy who smoking is crazy? because they have innate knowledge of structure dependence and so will not move the auxiliary from the relative clause. However, simple recurrent networks are also able to avoid such errors, on the basis of surface distributional properties of the input ( Lewis & Elman, 2001 ; Reali & Christiansen, 2005 ). Two new elicited production studies revealed that (a) children occasionally produce structure‐dependence errors and (b) the pattern of children's auxiliary‐doubling errors (Is the boy who is smoking is crazy?) suggests a sensitivity to surface co‐occurrence patterns in the input. This article concludes that current data do not provide any support for the claim that structure dependence is an innate constraint, and that it is possible that children form a structure‐dependent grammar on the basis of exposure to input that exhibits this property.     

The contribution of temperament,popularity, and physical appearance to children’s happiness

The relation between the happiness of 9–12 year old children and their temperament, popularity, and physical appearance was examined. Participants included 432 children and their parents and teachers. Happiness in children was assessed using a self-rating scale, parents’ ratings, teachers’ ratings, and the Happiness and Satisfaction Subscale of the Piers-Harris Children’s Self-Concept Scale 2 (Piers-Harris 2) [Piers, E. V., & Herzberg, D. S. (2002). Manual for the Piers-Harris Children’s Self-Concept Scale, 2nd ed. Los Angeles: Western Psychological Services]. Estimates of children’s temperament, popularity, and physical appearance included parents’ ratings, individual items on the Piers-Harris 2, and three domain scales from the Piers-Harris 2: the Freedom From Anxiety Subscale, Popularity Subscale, and Physical Appearance and Attributes Subscale. Children’s happiness was correlated with and predicted by ratings of their temperament, popularity, and appearance. Demographic variables did not account for appreciable variance in children’s happiness. The results parallel the common finding that internal factors (e.g., personality), but not external factors (e.g., demographics), predict adults’ happiness.     

Antecedent-Relative Comparative World Similarity

In “Backward Causation and the Stalnaker–Lewis Approach to Counterfactuals,” Analysis 62:191–7, (2002), Michael Tooley argues that if a certain kind of backward causation is possible, then a Stalnaker–Lewis comparative world similarity account of the truth conditions of counterfactuals cannot be sound. In “Tooley on Backward Causation,” Analysis 63:157–62, (2003), Paul Noordhof argues that Tooley’s example can be reconciled with a Stalnaker–Lewis account of counterfactuals if the comparative world similarity relation on which the Stalnaker–Lewis account relies is allowed to be antecedent-relative. In this paper I show that taking comparative world similarity to be antecedent-relative results in a formal semantics which is a comparative world similarity semantics in name only.     

The Reliability and Validity of Big Five Inventory Scores With African American College Students

The reliability and validity of scores on the Big Five Inventory (BFI; O. P. John, E. M. Donahue, & R. L. Kentle, 1991) were examined in a sample of 336 African American college students. Results indicated moderate reliability and structural validity for BFI scores. Additionally, BFI subscales had few meaningful correlations with self‐esteem and social desirability. La fiabilidad y la validez de los resultados del Inventario “Big Five” (BFI; O. P. John, E. M. Donahue, y R. L. Kentle, 1991) se examinan en una muestra de 336 estudiantes universitarios afro‐americanos. Los resultados indican una fiabilidad moderada y una validez estructural para los resultados del BFI. Adicionalmente, las subescalas del BFI tuvieron pocas correlaciones importantes con el auto‐estima y el deseo social.     

Location of a missing object and detection of its absence by infants: Contribution of an eye‐tracking system to the understanding of infants' strategies

Previous research has demonstrated infants' capacity to discriminate between situations in which all the objects successively hidden behind a screen are present, or not, after the removal of the screen. Two types of interpretation have been proposed: counting capacity or object memorization capacity. In the usual paradigm, the missing object in the impossible event is usually the last object which is placed behind the screen. Following this, a third interpretation can be offered: infants' exploration is first directed to this object's location, and its presence or absence is noticed. Two experiments using Wynn's (Nature 1992; 358 :749) paradigm were performed to test the third hypothesis. The first experiment involved four objects (teddy bears) placed in four squares. Infants looked longer at the impossible event (3 objects, the last one missing) than at the possible event (4 objects) when the impossible event was presented first. No difference in looking duration was observed for the opposite order. In the second experiment, the four objects were disposed in a line and an eye‐tracking system was used. No difference in the number of looks was observed between the impossible event (3 objects, the second one missing) and the possible event (4 objects). Therefore, it appears that at least in this complex situation (4 objects used instead of 2 usually), the location of the missing object is a key factor for event discrimination. Eye‐tracking also indicated in the second experiment that infants looked less at the second location during an impossible event (object missing) than during the possible event (object present), indicating that the impossibility of the event was not a determining factor for looking durations. Altogether, the data indicate the potential usefulness of eye‐tracking analysis in this type of situation. Copyright © 2004 John Wiley & Sons, Ltd.