The Idea of an Exact Number: Children's Understanding of Cardinality and Equinumerosity

Understanding what numbers are means knowing several things. It means knowing how counting relates to numbers (called the cardinal principle or cardinality); it means knowing that each number is generated by adding one to the previous number (called the successor function or succession), and it means knowing that all and only sets whose members can be placed in one‐to‐one correspondence have the same number of items (called exact equality or equinumerosity). A previous study (Sarnecka & Carey, 2008) linked children's understanding of cardinality to their understanding of succession for the numbers five and six. This study investigates the link between cardinality and equinumerosity for these numbers, finding that children either understand both cardinality and equinumerosity or they understand neither. This suggests that cardinality and equinumerosity (along with succession) are interrelated facets of the concepts five and six, the acquisition of which is an important conceptual achievement of early childhood.     

Henze on logic,creativity and art

Book Information The Indispensability of Mathematics. By Mark Colyvan. Oxford University Press. New York. 2001. Pp. 172. Hardback, £30.00.     

LOSS STORY

Loss has many layers and complexities.The experience itself is known socially while it registers emotionally, in the body. Both the social and the embodied experience comprise the subject matter that we seek to understand, perhaps even "know," as it plays its part in our lives. This knowledge arises in personal reflection and in the stories that are told after the event. In this respect stories are an integral part of the loss experience. The present article was written 5 years after the death of my father (and was itself triggered by another loss experience). Like the loss experience, stories of loss can be enriching, perhaps even transformative, when they communicate intellectually, emotionally, and viscerally.     

A laboratory analogue of mirrored-self misidentification delusion: The role of hypnosis,suggestion, and demand characteristics

Mirrored-self misidentification is the delusional belief that one’s own reflection in the mirror is a stranger. In two experiments, we tested the ability of hypnotic suggestion to model this condition. In Experiment 1, we compared two suggestions based on either the delusion’s surface features (seeing a stranger in the mirror) or underlying processes (impaired face processing). Fifty-two high hypnotisable participants received one of these suggestions either with hypnosis or without in a wake control. In Experiment 2, we examined the extent to which social cues and role-playing could account for participants’ behaviour by comparing the responses of 14 hypnotised participants to the suggestion for impaired face processing (reals) with those of 14 nonhypnotised participants instructed to fake their responses (simulators). Overall, results from both experiments confirm that we can use hypnotic suggestion to produce a compelling analogue of mirrored-self misidentification that cannot simply be attributed to social cues or role-playing.     

The Relation of Parent and Child Gender to Parental Tolerance of Child Disruptive Behaviors

Parental tolerance has been defined as the degree to which a parent tends to be annoyed by his or her child’s disruptive behavior. The purpose of the current study is to examine the relation of both parent and child gender to parental tolerance of child disruptive behaviors. Participants were 150 parents with 3–6 year-old at-risk children (47.5 % girls) who sought help with parenting of their child’s oppositional defiant behaviors. Tolerance was measured by the difference between parent ratings of intensity on 36 disruptive behaviors and whether each behavior was identified as a problem (resulting in a score of either high, expected, or low tolerance). A 2 (child gender) by 2 (parent gender) analysis of variance was conducted on the tolerance score. A significant interaction between child and parent gender emerged: Mothers were equally tolerant of boys’ and girls’ oppositional defiant behavior but fathers were more tolerant of boys’ than girls’ oppositional behavior. Exploratory analyses suggested that this interaction may be qualified by clinical status of the child. Implications and future directions are discussed.     

Father–Daughter Communication About Sex Moderates the Association Between Exposure to MTV’s 16 and Pregnant/Teen Mom and Female Students’ Pregnancy-Risk Behavior

MTV’s hit programs 16 and Pregnant and Teen Mom have been the subject of national debate since their inception. Supporters contend that the shows inhibit pregnancy-risk behavior. Critics contend that the shows glamorize adolescent motherhood and encourage pregnancy-risk behavior. The present study explored the possibility that the association between viewing 16 and Pregnant and Teen Mom and student females’ pregnancy-risk behavior depends on the extent to which females’ parents communicated with them about sex while they were growing up. Survey data were gathered from 313 female students. A disordinal interaction was found between father–daughter sexual communication, viewing frequency, and recent intercourse behavior. Frequent viewing was associated with an increased probability of having engaged in recent intercourse for females whose fathers did not communicate with them about sex while growing up. Conversely, frequent viewing was associated with a decreased probability of having engaged in recent intercourse for females whose fathers often communicated about sex with them while growing up. No interaction was found between mother–daughter sexual communication, viewing frequency, and recent intercourse behavior. These results suggest that fathers may play an especially important role in determining how sexual media socialize their daughters.     

Paying attention to reading errors in acquired dyslexia

The important role of selective attention in normal reading is illustrated by a relatively rare form of acquired dyslexia known as 'attentional dyslexia'. Theories of the functional deficit underlying this disorder differ as to the locus of the attentional dysfunction. A recent study by Mayall and Humphreys has contributed to this debate by studying letter migration errors in an attentional dyslexic.     

A job-seeking self-efficacy scale for people with physical disabilities: preliminary development and psychometric testing

People with disabilities are at an increased risk of unemployment. The role of interventions aiming to enhance the employment prospects of people with disabilities is receiving increased attention. However, evaluation is hampered by the paucity of measures specific to the needs of the target population. The purpose of the present study was to develop and conduct preliminary testing of the psychometric properties of a job-seeking self-efficacy (JSS) scale that reflected the experiences of people with physical disabilities. Job-seeking self-efficacy was defined as perceived ability to perform the skills involved in seeking employment that are salient to people with disabilities. Scale development and testing involved four studies and resulted in the 12-item JSS scale and six-item managing disability at interview (MDI) component, both of which were unidimensional and had high internal consistency. In addition, there was evidence of construct and concurrent validity. Greater jobseeking self-efficacy and perceived ability to manage disability at interview were associated with more positive psychological well-being. Only the MDI component was associated with physical functioning: lower perceived ability to manage disability at interview was associated with greater impairment of physical functioning. The pattern of associations supported the rationale for a separate component reflecting the need to resolve practical issues linked to access and availability of facilities before participation in the interview procedure per se .     

Inhibiting children's memory of an interactive event: the effectiveness of a cover‐up

Children are generally more susceptible than adults to suggestive interview techniques. Children's memories of an event can be altered and added to by presenting post‐event information (PEI). What is not known is whether embedding silence about a particular scene within the PEI makes that scene less likely to be reported. Children aged 5–6 years made cakes with an agent ‘Mrs Flour’. The following day they received PEI in which a target scene from the original event was omitted, resulting in children reporting the target scene significantly less often than did controls (control= 57% and omit= 23% correct responses). There was direct evidence from the children's language that the omission led to a detriment in memory for the original scene itself. Allowing children to draw during the interview did not reduce the effect. Implications are discussed in terms of child victims and witnesses particularly regarding child sexual abuse. Copyright © 2002 John Wiley & Sons, Ltd.