Evaluation of stimulus intensity fading on reduction of rapid eating in a child with autism

This study assessed the effects of a vibrating pager on reduction of rapid eating. The study also evaluated two strategies for fading the pager, by intensity and by frequency. The pager was successful in decreasing the pace of eating to an appropriate level and the pager prompt was successfully faded. Fading by frequency was ineffective in maintaining an appropriate pace of eating while intensity fading was successful.     

Increasing social initiations in children with autism: effects of a tactile prompt

An ABAB design was used to assess the effects of a tactile prompting device (i.e., a vibrating pager) as a prompt for the social initiations of 3 children with autism during free-play activities with typically developing peers. Results indicated that the tactile prompt was effective in increasing verbal initiations for all 3 children, and responses to peers' initiations were higher for 2 participants when the tactile prompt was used. Efforts to reduce the frequency of prompts while still maintaining rates of initiations were partially successful for 1 participant.     

Teaching teenagers with autism to seek assistance when lost

Three teenagers with autism were taught to respond to a vibrating pager to seek assistance in community settings when physically separated from their parents or teachers. A multiple baseline probe design across participants demonstrated that, upon being paged, participants successfully handed a communication card to a community member indicating that they were lost. Generalization was assessed in nontraining community sites and on outings with the participants' parents.     

Prototype awareness enhancing and monitoring device for trichotillomania

Trichotillomania is an impairing condition that involves repetitive hair pulling. Habit reversal therapy is helpful for many persons with this disorder. Unfortunately, habit reversal therapy is not helpful for everyone and maintenance of gains is often problematic. Successful habit reversal therapy requires the individual to be aware of hair pulling and handling. Unfortunately, most people with trichotillomania report that much of their plucking occurs outside of awareness. Monitoring of trichotillomania behaviors is also problematic. The present project involved a pilot study of a prototype awareness enhancing and monitoring device aimed at increasing the effectiveness of habit reversal therapy. The device included a watch, bracelet, magnetic necklace, and a pager that was hard-wired for remote activation of a vibrating alert when hair pulling behaviors occurred. Following structured diagnostic assessment, three female participants were randomly assigned to be initially observed for varied lengths of time without the device followed by observation with the device in place. The results indicated a marked reduction in trichotillomania behaviors when the device was in place. Semi-structured interviews revealed that the device was very effective in enhancing awareness and monitoring of trichotillomania related behaviors and enthusiastic acceptance of the device was provided by all participants.     

Contributions of acute bouts of vigorous physical activity to explaining diurnal variations in feeling states in active, middle-aged women.

This study describes diurnal variations in feeling states in 84 women as a function of involvement in physical activity. Women completed feeling state checklists before and after bouts of vigorous physical activity that lasted a minimum of 20 min and on a stratified random-sampling protocol in response to a stimulus from an electronic pager. Participants self-reported the date, the time of day, the stimulus for responding, their current feeling states, and their ongoing activity. A total of 7,295 complete mood and activity reports were recorded in response to pager calls that were further coded into experience samplings that occurred on a nonexercise day, prior to exercise on an exercise day, and following exercise on an exercise day. Multilevel modeling analyses showed that in samplings recorded following exercise on exercise days, positive engagement, revitalization, and tranquility were elevated in comparison with predicted diurnal patterns.     

The emergence of emotions and religious sentiments during the September 11 disaster

Analyzing emotional states under duress or during heightened, life-and-death situations is extremely difficult, especially given the inability of laboratory experiments to replicate the environment and given the inherent biases of post event surveys. This is where natural experiments, such as the pager communications from September 11th can provide the kind of natural experiment emotion researchers have been seeking. We demonstrate that positive and pro-social communications are the first to emerge followed by the slower and lower negative communications. Religious sentiment is the last to emerge, as individual attempt to make sense of event. Additionally we provide a methodological discussion about the preparation and analysis of such natural experiments (the pager message content) and show the importance of using multiple methods to extract the broadest possible understanding.     

Visual palatability of food in patients with eating disorders and dieting women

The effects of 19 meals of different caloric content on slides on palatability and hypothetical duration of consumption were investigated in 7 patients with anorexia nervosa, 17 patients with bulimia nervosa at the beginning and after 8 weeks of hospital treatment. Nine healthy females served as controls. At the beginning of treatment, palatability of low caloric food was significantly higher and hypothetical duration of consumption of high caloric food was significantly longer in patients when compared to controls. After 8 weeks, in the patients palatability of low caloric food had decreased. Dislike for high caloric food remained stable in anorexics.     

Experiential correlates of time alone in adolescence1

Seven hundred and fifty-three observations were collected on 25 adolescents at random times during an average week. The observations consisted of self-reports completed in response to an electronic pager. The study was aimed at the question: What is the experience of time alone like for adolescents? The results suggest a complex but consistent relationship: while aloneness is generally a negative experience, those adolescents who spend a moderate amount of time alone (about 30 percent of their waking time) tend to show better overall adjustment than adolescents who are either never alone or spend more than the optimal proportion of time alone. Alienation and average moods showed inverse linear or quadratic relationships with amount of time alone. These results are discussed in terms of the possible psycho-social functions of aloneness at the adolescent stage of the life cycle.     

Evocation and characterization of percepts of apparent motion on the face

The percepts evoked by sequential stimulation of sites in close spatial proximity (<2.5 cm) on the face were studied. Both method-of-limits and magnitude-estimation procedures were used to identify and characterize alterations in the percepts produced by systematic changes in the temporal and spatial parameters of the sequence. Each site was stimulated by a vertically oriented row of miniature vibrating probes. Apparent motion was consistently perceived when the delay between the onsets of sequentially activated rows (interstimulus onset interval, or ISOI) fell within a relatively narrow range of values, the lower limit of which approximated 5 msec. Both the upper limit and the perceived smoothness and continuity of the motion percepts (goodness of motion) increased with the duration for which each row stimulated the skin over the range evaluated, 15–185 msec. For the successive activation of only two rows, goodness of motion was not influenced by changes in their separation from 0.4 to 2.5 cm. The ISOI values at which magnitude estimates of goodness of motion were highest increased with the duration for which each row stimulated the skin. As such, maximum goodness of motion decreased with increases in the apparent velocity of motion. When the number of sequentially activated rows was increased from two to four or more, the quality of the motion percepts improved. For the successive activation of multiple closely spaced rows, values of ISOI at which numerical estimates of goodness of motion were highest approximated integral fractions of the duration for which each row stimulated the skin. In this situation, the probes rose and fell in a regular, step-locked rhythm to simulate an edge-like or rectangular object moving across the skin. The goodness of motion so attained was relatively independent of the apparent velocity of motion.     

MODIFYING HOW PEOPLE SMOKE: INSTRUCTIONAL CONTROL AND GENERALIZATION1

The modification of smoking behavior usually involves the target goal of total abstinence. However, many smokers are unable or unwilling to quit completely. An alternative is to teach people to smoke in ways that minimize the associated health risks. Such an approach would involve decreasing smoking rate, switching to “safer” tobacco products, and modifying the topography of consumption. Previous research has shown that topographical components of smoking behavior such as puff frequency, puff duration, cigarette duration, and amount smoked can be reliably measured and experimentally manipulated (Frederiksen, Miller, and Peterson, Addictive Behaviors, 1977, 2 , 55–61). Further, there is preliminary evidence from a single-subject experiment that topography can be changed in clinically relevant directions and that such changes can generalize to the smoker's natural environment (Frederiksen and Simon, Behavior Therapy, in press). To replicate and extend these findings, three single-subject experiments were conducted. In each experiment, verbal instructions to modify individual components of smoking topography were sequentially introduced using a multiple-baseline design across components. The components of puff frequency and puff duration were modified in three experiments. Cigarette duration was also modified in two experiments. Following the topography change phase, daily smoking rate was stabilized, using a behavioral contracting procedure (Frederiksen, Peterson, and Murphy, Addictive Behaviors, 1976, 1 , 193–196). Generalization was assessed during sessions in which no instructions were given (Subjects 1 and 3) and at six monthly followups (Subjects 2 and 3). For Subjects 2 and 3, data were also available on the amount of carbon monoxide (CO) uptake associated with the consumption of a cigarette (postcigarette CO-precigarette CO). This physiological measure is important because CO and its byproducts constitute a major health risk (Russell, Lancet, 1974, 1 , 254–258). Results showed that instructions were effective in modifying components of smoking topography. These changes generalized to sessions in which no instructions were given and across six months of followup. Daily smoking rate did not increase during topography change nor did smoking topography deteriorate when smoking rate was subsequently stabilized on a behavioral contract. Subjective ratings of smoking enjoyment decreased during topography change for two of three subjects but subsequently returned to baseline levels during followup. The observed topography changes were associated with a decrease in the amount of each cigarette smoked. Mean CO uptake was also reduced from baseline levels of 6.0 ppm and 8.0 ppm (Subjects 2 and 3, respectively) to followup levels of 3.3 ppm and 2.1 ppm. These results replicate and extend previous work and suggest that moderate or “controlled” smoking is an approach that deserves continued attention. The importance of assessing smoking topography and physiological variables, as well as directions for subsequent investigation, are discussed.     

Episodic memory function is affected by lifestyle factors: a 14-year follow-up study in an elderly population

Understanding the relationship between memory function and lifestyle offers great opportunities for promoting beneficial lifestyle choices to foster healthy cognitive aging and for the development of intervention programs for older adults. We studied a cohort of older adults (age 65 and older) enrolled in the Longitudinal Aging Study Amsterdam, an ongoing prospective population-based research project. A total of 1,966 men and women participated in an episodic memory test every 3 years over a period of 14 years. Lifestyle habits were repeatedly assessed using self-report measures. Physical activity, light-to-moderate alcohol consumption, difficulties staying asleep, and social engagement were associated with better memory function over the course of 14 years. In contrast, smoking and long sleep duration were associated with worse memory function. These findings suggest that certain lifestyle factors can have long-term protective or harmful effects on memory function in aging individuals.     

Imposed vibration influences perceived tactile smoothness

According to the duplex theory of tactile texture perception, detection of cutaneous vibrations produced when the exploring finger moves across a surface contributes importantly to the perception of fine textures. If this is true, a vibrating surface should feel different from a stationary one. To test this prediction, experiments were conducted in which subjects examined two identical surfaces, one of which was surreptitiously made to vibrate, and judged which of the two was smoother. In experiment 1, the vibrating surface was less and less often judged smoother as the amplitude of (150 Hz) vibration increased. The effect was comparable in subjects who realized the surface was vibrating and those who did not. Experiment 2 showed that different frequencies (150-400 Hz) were equally effective in eliciting the effect when equated in sensation level (dB SL). The results suggest that vibrotaction contributes to texture perception, and that, at least within the Pacinian channel, it does so by means of an intensity code.     

Drinking behavior in the chronic phase of alcoholism

40 patients in the chronic phase of alcohol addition were questioned in order to identify drinking stereotypes with regard to consumption in the course of the day and year. Alcohol intake reaches a maximum between 8 and 9 PM. No clear differences were found in this respect between days of abstinence for social reasons and days without such social pressures. In the course of the year, alcohol consumption reaches a maximum in autumn and a minimum in spring. The uniform, repetitive drinking rituals are suspected to have become habitual in the course of several years until they are finally unaffected by environment. This leads to a convergence of addiction forms, but the duration of the daily abstinence period still permits differentiation between gamma and delta addicts even when addiction has reached an advanced stage.     

Taste avoidance caused by spontaneous wheel running: effects of duration and delay of wheel confinement

Confinement of a rat in a running wheel results in the rat's subsequent avoidance of the taste consumed before the confinement. This phenomenon has been ascribed to taste aversion conditioned by spontaneous wheel running. As a first step toward clarification of the underlying mechanism of this phenomenon, we manipulated two parameters of the taste-confinement procedure: duration of wheel confinement (Experiments 1A and 1B) and temporal intervals between the taste consumption and the wheel confinement (Experiments 2A and 2B). In general, longer confinement and shorter inter-event interval caused stronger taste avoidance. However, the results also suggested that it is possible to establish taste avoidance when wheel confinement was delayed 1-h after the taste consumption. These results correspond to those of conventional taste aversion caused by illness-inducing agents, suggesting similar mechanisms in the both preparations. Experiment 3 revealed that running in a wheel rather than wheel confinement itself is the effective factor for establishing taste avoidance.     

Consumption-leisure tradeoffs in pigeons: Effects of changing marginal wage rates by varying amount of reinforcement

Pigeons' rates of responding and food reinforcement under simple random-ratio schedules were compared with those obtained under comparable ratio schedules in which free food deliveries were added, but the duration of each food delivery was halved. These ratio-with-free-food schedules were constructed so that, were the pigeon to maintain the same rate of responding as it had under the simple ratio schedule, total food obtained (earned plus free) would remain unchanged. However, any reduction in responding would reduce total food consumption below that under the simple ratio schedule. These “compensated wage decreases” led to decreases in responding and decreases in food consumption, as predicted by an economic model of labor supply. Moreover, the reductions in responding increased as the ratio value increased (i.e., as wage rates decreased). Pigeons, therefore, substituted leisure for consumption. The relationship between these procedures and negative-income-tax programs is noted.     

REDUCING RAPID EATING IN ADULTS WITH INTELLECTUAL DISABILITIES

Rapid eating is a frequent problem among individuals with developmental disabilities that can pose a threat to health. This study sought to reduce the rate of eating behaviors in two adults diagnosed with moderate intellectual disability. Assessment of eating rate took place in the participants' group homes during lunch or dinner meals. Procedures included the use of vibrating pagers with and without verbal prompts to prompt eating and prevent rapid eating behaviors. Results demonstrate a clear reduction in rate of eating when using vibrating pagers and verbal prompts for both participants. Copyright © 2012 John Wiley & Sons, Ltd.     

Educational inequalities in quantity, duration and type of tobacco consumption among lung cancer patients in Asturias: epidemiological analyses

Socioeconomic inequalities cause different tobacco consumption patterns. The purpose of this study was to examine the relationship between educational level and smoking behaviour, including type of tobacco consumption, in lung cancer patients. To this end, epidemiological analyses of 801 lung cancer patients recruited for a case-control study in four public hospitals in Asturias, Spain, between October 2000 and April 2006 were carried out. Smoking behaviour and educational level data were obtained through personal interview. Analyses indicated that the probability of heavy smoking among low educational-level patients was approximately twice as high as for high educational-level patients (RRR>31.2 packs/years=2.04; CI 95%=1.15-3.62; RRR>52packs/years=2.14; CI 95%=0.98-4.64). Low-educated patients were more than three times as likely to be long-time smokers (RRR>40 years=3.30; CI 95%=1.43-7.62). The probability of smoking exclusively black tobacco was almost four times greater in low educational-level patients (RRRblack only=3.72; CI 95%=1.23-11.19). The results show that there are broad educational inequalities with regard to the quantity, duration and type of tobacco consumption among lung cancer patients in Northern Spain.     

Alcohol and group formation: a multimodal investigation of the effects of alcohol on emotion and social bonding

We integrated research on emotion and on small groups to address a fundamental and enduring question facing alcohol researchers: What are the specific mechanisms that underlie the reinforcing effects of drinking? In one of the largest alcohol-administration studies yet conducted, we employed a novel group-formation paradigm to evaluate the socioemotional effects of alcohol. Seven hundred twenty social drinkers (360 male, 360 female) were assembled into groups of 3 unacquainted persons each and given a moderate dose of an alcoholic, placebo, or control beverage, which they consumed over 36 min. These groups' social interactions were video recorded, and the duration and sequence of interaction partners' facial and speech behaviors were systematically coded (e.g., using the Facial Action Coding System). Alcohol consumption enhanced individual- and group-level behaviors associated with positive affect, reduced individual-level behaviors associated with negative affect, and elevated self-reported bonding. Our results indicate that alcohol facilitates bonding during group formation. Assessing nonverbal responses in social contexts offers new directions for evaluating the effects of alcohol.     

Control of responding by stimulus duration

Pigeons were trained on a procedure in which the key was white for 30 sec, alternating with periods of darkness, or timeout. In a nondifferential training procedure, timeout duration was held constant at either 9 or 21 sec for different animals, and pecks on the white key were reinforced on a variable-interval 36-sec schedule. After 30 sessions an extinction generalization test was conducted where the duration of the timeout was varied from 3 to 27 sec. This test showed no differences in responding following timeouts of different durations. In a differential training procedure, timeout durations of either 9 or 21 sec were randomly scheduled for each animal. The variable-internal schedule was in effect following the same timeout duration as in the prior nondifferential procedure. No pecks were reinforced after the other timeout duration. In 40 sessions, differences in response rates following the two durations gradually developed. A maintained generalization procedure was then imposed in which timeout durations were varied from 3 to 27 sec, with the variable-interval schedule in effect following only the same duration as in the previous procedures. The first maintained generalization session showed that the prior differential training had established control of the animals' behavior by the timeout duration. In continued training on the maintained generalization procedure, control by the timeout duration decreased.     

Quality of life in patients with alcohol dependence disorder with personality disorders: relation to psychological adjustment and craving

The purpose of this study is to determine the self-perceived quality of life of abstinent patients with alcohol dependence disorder during the first month of treatment, and how the presence of personality disorders, psychological adjustment, and the level of craving affect this perception. For this purpose, a sample was used comprising 65 participants with mean age of 43.26 years, of whom 70.8% were male and 29.2% female, with a mean duration of addiction to alcohol consumption of 11.83 years. The results show that quality of life is not related to the duration of abstinence or the course of the addiction. Moreover, the patients who present a personality disorder perceive poorer quality of life in areas such as health status, mood, and social relations. Self-perception of quality of life is affected by psychological adjustment and beliefs about craving. These data should be taken into account when considering quality of life as a measurement of the effectiveness of a treatment for drug addicts with personality disorders.