Ordinal representation of numeric quantities by brown capuchin monkeys (Cebus apella)

Using techniques established by E. M. Brannon and H. S. Terrace (2000) with rhesus macaques (Macaca mulatta), the authors tested the ability of brown capuchins (Cebus apella) to order arrays of items ranging in quantity from 1 to 9. Three monkeys were trained on a touch screen to select the quantities 1-4 in ascending order. The monkeys exhibited successful transfer of this ability to novel representations of the quantities 1-4 and to pairs of the novel quantities 5-9. Patterns of responding with respect to numeric distance and magnitude were similar to those seen in human subjects, suggesting the use of similar psychological processes. The capuchins demonstrated an ordinal representation of quantity equivalent to that shown in Old World monkeys.     

Why people see things that are not there: a novel Perception and Attention Deficit model for recurrent complex visual hallucinations

As many as two million people in the United Kingdom repeatedly see people, animals, and objects that have no objective reality. Hallucinations on the border of sleep, dementing illnesses, delirium, eye disease, and schizophrenia account for 90% of these. The remainder have rarer disorders. We review existing models of recurrent complex visual hallucinations (RCVH) in the awake person, including cortical irritation, cortical hyperexcitability and cortical release, top-down activation, misperception, dream intrusion, and interactive models. We provide evidence that these can neither fully account for the phenomenology of RCVH, nor for variations in the frequency of RCVH in different disorders. We propose a novel Perception and Attention Deficit (PAD) model for RCVH. A combination of impaired attentional binding and poor sensory activation of a correct proto-object, in conjunction with a relatively intact scene representation, bias perception to allow the intrusion of a hallucinatory proto-object into a scene perception. Incorporation of this image into a context-specific hallucinatory scene representation accounts for repetitive hallucinations. We suggest that these impairments are underpinned by disturbances in a lateral frontal cortex-ventral visual stream system. We show how the frequency of RCVH in different diseases is related to the coexistence of attentional and visual perceptual impairments; how attentional and perceptual processes can account for their phenomenology; and that diseases and other states with high rates of RCVH have cholinergic dysfunction in both frontal cortex and the ventral visual stream. Several tests of the model are indicated, together with a number of treatment options that it generates.     

What children are looking at during shared storybook reading

Two studies were conducted to determine the extent to which young children fixate on the print of storybooks during shared book reading. Children's books varying in the layout of the print and the richness of the illustrations were displayed on a computer monitor. Each child's mother or preschool teacher read the books while the child sat on the adult's lap wearing an EyeLink headband that recorded visual fixations. In both studies, children spent very little time examining the print regardless of the nature of the print and illustrations. Although fixations on the illustrations were highly correlated with the length of the accompanying text and could be altered by altering the content of the text, fixations to the text were uncorrelated with the length of the text. These results indicate that preschool children engage in minimal exploration of the print during shared book reading.     

A token reinforcement program in a public school: a replication and systematic analysis

A base rate of disruptive behavior was obtained for seven children in a second-grade class of 21 children. Rules, Educational Structure, and Praising Appropriate Behavior while Ignoring Disruptive Behavior were introduced successively; none of these procedures consistently reduced disruptive behavior. However, a combination of Rules, Educational Structure, and Praise and Ignoring nearly eliminated disruptive behavior of one child. When the Token Reinforcement Program was introduced, the frequency of disruptive behavior declined in five of the six remaining children. Withdrawal of the Token Reinforcement Program increased disruptive behavior in these five children, and reinstatement of the Token Reinforcement Program reduced disruptive behavior in four of these five. Follow-up data indicated that the teacher was able to transfer control from the token and back-up reinforcers to the reinforcers existing within the educational setting, such as stars and occasional pieces of candy. Improvements in academic achievement during the year may have been related to the Token Program, and attendance records appeared to be enhanced during the Token phases. The Token Program was utilized only in the afternoon, and the data did not indicate any generalization of appropriate behavior from the afternoon to the morning.     

The effect of grip-tension on tactile-kinaesthetic judgement of width

The effect of various grip-tensions on the accuracy of kinaesthetic width judgements was tested. Forty first-year psychology students were used as subjects. Significant differences in accuracy between pressures were found in the descending adjustments with greatest accuracy at 1.0 kg. Some significant differences were found between pressures in ascending adjustments. All subjects overestimated on the descending and underestimated on the ascending trials at all pressure levels. Increased grip-tension was found to reduce the accuracy of width judgement in terms of constant error while affecting varlance only slightly.     

Pediatric discourse on corporal punishment: A historical review

Corporal punishment is a commonly used, but controversial disciplinary technique. This article reviews the pediatric professional response to corporal punishment over the past century. We focus predominantly on the discourse written to educate pediatricians, for the most part, textbooks. Using the sociologic construction of deviance proposed by Conrad and Schneider, we show how corporal punishment has moved from a condoned behavior to a socially deviant behavior. Based on our review of this literature, we delineate three distinct pediatric professional attitudes toward corporal punishment over this century:(a) corporal punishment as morally sanctioned behavior, (b) corporal punishment as atool for controlling behavior, and (c) corporal punishment as abusive. We show how each of these stances developed and demonstrate how these stances inform paradigms that are still operative today. By reviewing changes in pediatric thought toward corporal punishment, this article provides a useful framework for child health professionals struggling with the appropriateness of corporal punishment as a disciplinary technique.     

Perceived Believability Among Adolescents of Health Warning Labels on Cigarette Packs1

This study investigated the extent to which adolescents believe the health warning labels on cigarette packs, and the relationship of current smoking status and gender to the believability ratings. Subjects were 691 students in grades 5 through 12. MANOVAs revealed that, smokers, both male and female, reported significantly less belief in the validity of 3 of the health warning labels than nonsmokers. These findings support prior investigations which indicate that adolescent smokers are less likely to accept the specific health risks associated with smoking than nonsmokers. The results, however, also raise the question as to what value such health warning labels have as a deterrent to cigarette smoking.     

Invasive partners: an exploration of attachment, communication and family patterns

Therapists'ratings on a sample of heterosexual couples receiving marital or partnership counselling were used to develop measures of'invasive'behaviour by the adults concerned. We suggest that this behaviour stems from difficulties in attachment and is marked by a desire to stay close to the other person, difficulties in communication, difficulties in handling relationships between three people, and problems associated with the birth of a baby. A particular feature of this behaviour is that one or other partner attempts to restrict communication from the other, perhaps in order to avoid surprises which are perceived as a threat to the relationship. Invasiveness by wives was high in those couples who had had problems after the birth of a baby and significantly lower in those who had not. Implications for practice are discussed.