Computerized stroop test to assess selective attention in children with attention deficit hyperactivity disorder

Research shows abnormal function of the pre-frontal cortex in Attention Deficit Hyperactivity Disorder (ADHD). This cortex is involved in the control of executive functions related to planning and execution of goal-oriented strategies, working memory, inhibitions, cognitive flexibility, and selective attention. Selective attention involves focus on the target stimulus, ignoring competing distractions. The Stroop Test (Stroop, 1935) is usually used to evaluate selective attention. This study investigated whether children with ADHD could exhibit modified performance in the Stroop Test. Using a computerized version of this test (Capovilla, Montiel, Macedo, & Charin, 2005), the study compared the reaction times (RTs) of 62 Brazilian children, between 8 and 12 years of age, 31 of whom were diagnosed with ADHD and sent to psychiatric clinics, and 31 without ADHD studying in regular schools. All children with ADHD satisfied the criteria of the DSM-IV-TR and were evaluated with the Conners Abbreviated Questionnaire (Goyette, Conners, & Ulrich, 1978), completed by parents and teachers. The results revealed that children with ADHD exhibit greater interference in RT than children without ADHD. This corroborated the hypothesis that children with ADHD exhibit a deficit in selective attention, consisting in augmented RTs, as measured by the Computerized Stroop Test.     

Validity and internal consistency reliability of a computerized test to assess prone extension in children ages four to six years

The objective of this study was to develop a computerized test of prone extension to measure performance of prone extension in children 4 to 6 years of age. The participants were selected from kindergartens, comprising 132 boys and 107 girls with a mean age of 5 yr. 2 mo. (SD = 6 mo.). Sensitivity and specificity of the computerized test of prone extension were assessed by comparison with the judgments of an expert, an occupational therapist with more than 20 yr. of pediatric experience, as the criterion standard. The computerized test of prone extension identified children with poor outcomes with a sensitivity of 0.83, a specificity of 0.88, and an accuracy of 0.87. The internal reliability index was 0.81. The computerized test of prone extension could be of value in detecting problems of antigravity posture in prone extension and permitting early intervention to correct it.     

On the use of the Ternus test to assess magnocellular function

Ternus stimuli give rise to two mutually exclusive visual experiences: with long interstimulus intervals (ISIs) the elements in the stimulus are perceived as moving together as a group ('group movement'), while at shorter ISIs only a single element appears to be moving ('element movement' or 'end-to-end movement'). It has been hypothesized that group and element movements, respectively, reflect magnocellular and parvocellular activity. On this basis, Ternus tests have been used to assess magnocellular function in dyslexic individuals. This use of Ternus stimuli is examined in the present report. On the basis of amplitude spectra of the stimuli and of a review of previous studies it is concluded that to use Ternus tests to assess magnocellular function is problematic.     

Development of the use of conversational cues to assess reality status

In this study we assessed children's ability to use information overheard in other people's conversations to judge the reality status of a novel entity. Three- to 9-year-old children (N = 101) watched video clips in which two adults conversed casually about a novel being. Videos contained statements that either explicitly denied, explicitly affirmed, or implicitly acknowledged the entity's existence. Results indicated that children of all ages used statements of denial to discount the reality status of the novel entity, but that this ability improved with age. By age 5, children used implicit existence cues to judge a novel entity as being real. Not until age 9, however, did children begin to doubt the existence of entities whose reality status was explicitly affirmed in conversation. Overall, results indicate that the ability to use conversational cues to determine reality status is present in some children as early as age 3, but recognition of the nuanced language of belief continues to develop during the elementary-school years.     

MINDS: Toward a computerized test battery for use in health psychological and neuropsychological assessment

MINDS (Mental Information Processing and Neuropsychological Diagnostic System) was developed with the goal of integrating a number of independent and stand-alone test programs that are used in the diagnosis of psychological and neuropsychological health. The system runs under MS-DOS. The shell program integrates subject information with data obtained through the use of the individual test programs. The current test battery comprises tasks on memory, attention, and motor performance; these tasks require the use of additional peripheral response devices, which are controlled via a multiple I/O interface card. Questionnaires are also included; they have been developed with the author language shell program MicroCAT. MINDS is programmed to allow easy integration of new tests. As an example, the Motor Planning Test is described. The equivalence of the computerized questionnaires with existing tests is also discussed.     

Continuous attention: rationale and discriminant validation of a test designed for use in psychopharmacology

The continuous attention task (CAT) is a test designed to assess changes in attention due to a variety of factors, for example, drugs. Subjects view a series of 3x3 patterns of squares on a monitor screen, each displayed for 100 msec at intervals of 1.5–2.5 sec, and respond whenever two successive patterns are identical. For such a measure to be validr factors other than attention should be investigated, and shown not to be a factor in performance. Nineteen subjects took part in a study in which information-processing rate and recall of CAT figures was measured. The results showed that a viewing time of 50–60 msec was sufficient for 50% correct recognition of CAT figures, and that recognition with a masked presentation of 100 msec did not differ significantly from an unmaske presentation of 100 msec. Mean recall of CAT figures 2 sec after a 100-msec exposure was 98.2%. These results suggest that performance on the CAT is not limited by either information-processing speed or memory capacity, but is a valid measure of the ability to sustain attention.     

Benchmarking a computerized test of immediate verbal memory

We modified the traditional (verbal) digit span task for administration via computer and the Internet. This online version collects data on the floor and ceiling of a subject's span capacity, rather than generating a rough estimate of capacity based on a 50% success rate, as the traditional version does. We compared the two versions within adult subjects in two cohorts: college-age normal readers and college-age reading-disabled readers. To explore the reliability of the online version as a research tool, we employed the Bland-Altman approach to examine agreement between instruments. The online version yielded spans similar to those yielded by the traditional version, tending toward smaller values at the high end and larger values at the low end of span sizes, in the typical readers. It differentiated between the better and poorer readers reliably, and to the same extent as does the verbal version. The online version of the digit span task is comparable to the traditional version in assessing verbal span capacity; the code with which to implement the task is available at www.psychonomic.org/archive.     

Preliminary data on a computerized test of finger speed and endurance

We set out to develop a computer-assisted finger-tapping task (the T3) that would measure motor speed much like the Reitan test, but that would also measure endurance. Data were collected for a convenience sample on both the T3 and the Reitan finger-tapping test. Moderate and significant correlations were obtained between the T3 and the Reitan test for both hands. Mean scores for the first 50 sec of the T3 were approximately 0.15 taps greater than the mean Reitan score for both the preferred and the nonpreferred hands, while the mean scores for the full 2 min of the T3 were 1.52 taps less than those of the Reitan test for the preferred hand, and 1.32 taps less for the nonpreferred hand. The mean for the last 40 sec with the preferred hand averaged 3.93 taps (7.62%) slower than for the first 40 sec, whereas for the nonpreferred hand, the difference was 5.12 taps (11.15%). These results are consistent with our intent to develop measures of (1) relatively pure motor speed (the first 50 sec of the T3); (2) motor speed combined with endurance (the full 2 min of the T3); and (3) finger endurance (the first 40 sec compared with the last 40 sec of the T3).     

On the use of discrimination to assess memory

A number of studies have made use of sensory discrimination to assess memory. These experiments have typically employed a temporal two-alternative forced choice paradigm in which the interstimulus interval (ISI) is varied. Many of these tests have shown that ISI has little or no effect on discrimination performance. This has been taken as evidence for perfect or very good memory. An alternative interpretation would be that discrimination tests lack sufficient sensitivity to reveal memory effects. In the present study, computer simulations based on signal detection theory were used to estimate the relative effects of memory noise and direct noise (i.e., noise inherent in the discrimination task) on discrimination performance. These simulations indicate that the amount of memory noise has to be quite large to cause a marked elevation in discrimination thresholds and that sensory discrimination is a relatively insensitive test of memory.     

Immediate and delayed memory tasks: A computerized behavioral measure of memory, attention, and impulsivity

The Immediate and Delayed Memory Task (IMT/DMT), a variant of the Continuous Performance Test (CPT), is a new software package designed to be a flexible research tool for the study of attention, memory, and impulsivity. This package allows researchers to determine the design to be used during a testing session and to manipulate many of the parameters. It features two components: the IMT and the DMT, both of which present sequential 2- to 7-digit stimuli with variable presentation rates and intertrial intervals. Subjects respond to identically matched stimuli presented consecutively, spanning a brief period of time (IMT), or to stimuli spanning a greater period of time (during which intervening stimuli to be ignored appear; DMT). Task complexity can be adjusted to suit applications for both children and adults. Preliminary studies have demonstrated that these laboratory tasks are sensitive to group differences, produce stable baselines of performance, and are sensitive to drug-induced performance decrements.     

The use of a screening device to assess psychopathy in young offenders

The aim of this research was to determine to what extent a psychopath screening device (the APSD) is useful in forensic assessments to predict general and violent offending. For this purpose, a cross-sectional study was done and 238 young people serving a sentence were assessed. The gold standard instrument used to measure psychopathy was the Psychopathy Checklist: Youth Version (PCL:YV; Forth, Kosson & Hare, 2003). The results indicate that the association found between the screening device scores and several indicators of risk is low if compared with those obtained with the PCL:YV, suggesting that it is less useful as a tool in order to predict offending or violent offences. However, an Area Under the Curve of .784 and a validity index of 62.5 support its use as a screening device or as a preliminary approach to assess psychopathy in this population. The usefulness of this instrument to make assessments with young people in the forensic setting is discussed.     

Development and validation of a scale to assess positive youth development values

This paper describes the development of a self-report scale for adolescents to assess positive youth development values. It presents a substantial number of psychometric results performed on a sample of 2,400 adolescents (1,068 boys and 1,332 girls) from 12 to 17 years ( M = 14.73, SD = 1.25), who were studying secondary education in Western Andalusia. The results provide evidence of the psychometric quality of items, cross-validity of a structure of eight first-order factors and three second-order factors, obtained through exploratory and confirmatory factor analysis, and adequate reliability. This study concludes that the scale presents adequate evidence of validity and reliability that allows assessment, especially in school contexts, of a broad set of values of particular relevance to positive youth development.     

Psychopathy, risk taking, and attention: a differentiated test of the somatic marker hypothesis

A. R. Damasio's (1994) somatic marker hypothesis relates psychopathy to deficits in the ventromedial prefrontal cortex. Using the gambling task (A. Bechara, A. R. Damasio, H. Damasio, & S. Anderson, 1994), the authors tested this premise and the role of attention as a moderator. Forty-nine male prison inmates were assessed with the Psychopathy Checklist--Revised (R. D. Hare, 1991), the gambling task, and standardized tests on attention-concentration, and intelligence. Results revealed no general relation between psychopathy and gambling task performance. However, psychopathic inmates with low attention scores gambled worse than did the attentive ones. They also had more previous convictions. In nonpsychopathic individuals, attention had no impact. Different processing strategies for psychopathic and nonpsychopathic individuals are proposed to explain these findings.     

A comparison of instruction formats for administering a computerized behavioral test

Shaping and fading techniques were employed to replace written instructions used in computerized behavioral tests. Apple Macintosh computers and HyperCard with Pascal extensions were chosen as the development environment to implement the new techniques. Initial Findings demonstrate the effectiveness and relative efficiency of shaping techniques to teach correct performance on the Symbol-Digit Test.     

Development and preliminary validation of a scale to assess managing the emotions of others

A new scale, the managing the emotions of others scale (MEOS), was developed. Items were derived from real-life examples provided by an initial group of participants. The resulting scale was completed by 695 participants in a web survey. The factor structure of the scale was examined and a confirmatory factor analysis was also performed on a second sample (N = 276). Six factors were obtained: mood enhancing (Enhance), mood worsening (Worsen), concealing emotions from others (Conceal), use of inauthentic displays (Inauthentic), poor emotional skills (Poor skills), and use of diversion to enhance another’s mood (Divert). Correlations of the factor scores with short measures of the Big Five, the Dark Triad and trait emotional intelligence were examined. Enhance and Divert were strongly correlated with Agreeableness, whilst Worsen and Inauthentic were strongly correlated with all of the Dark Triad. These associations are interpretable in terms of the affiliative nature of Agreeableness and the interpersonally manipulative nature of the Dark Triad. The MEOS factors provide coverage of the different ways (prosocial and non-prosocial) in which people manage the emotions of others.     

Development of a scale to assess occupational stress in Rural General Practitioners

One hundred and eighty-four physicians or General Practitioners (GPs) in the five Divisions of General Practice in Rural New South Wales, Australia, completed scales designed to assess Workplace Stressors, Negative Affect caused by stressors, General Work Stress, Other Stress, and General Health. GP Stress was positively correlated with Negative Affect, General Work Stress, poor Psychological Health, poor Somatic Health, Anxiety, Social Dysfunction, and Depression. Results showed that the Rural GP Stress Scale (scale that assessed the presence of stressors in the GPs' work environment) possessed concurrent or criterion validity. Factor analysis of GP Stress scores revealed Workload, Family and Leisure Considerations, Bureaucratic Interference, Education and Training Considerations, and Professional Isolation as five of the nine major stressors in the GPs' work environment. Re-testing, 4–6 weeks later, revealed that the Rural GP Stress Scale was highly reliable.     

Development of a tool to assess suicide risk factors in urban adolescents

Dramatic increases in the adolescent suicide rate over the past three decades have underscored the need for risk-assessment tools. The tools that do exist are oriented to older populations and their application to adolescents is questionable. A project was initiated at the University of Utah's Health Education Department to develop a pilot instrument to examine the differences between adolescents who have attempted suicide and other teenagers. Eighty-two subjects between the ages of 14 and 19 participated in the test of this instrument. Twenty-five subjects were identified by a physician or psychologist as having failed in a sincere suicide attempt within the previous 18 months. Fifty-seven nonsuicide attempters with similar demographic profiles served as a comparison group. An 86-item questionnaire was administered to both groups. Questions were generated from a review of the literature of the past three decades for problems associated with suicide in this population. Questions were sorted into three domains (family environment, social environment, and self-perceptions), with each domain having several subdomains. Statistical analysis revealed significant differences for each of the three domains and on 55 of 86 questions. The results were used to create a streamlined instrument for assessing suicide risk that can be administered in 20 minutes.     

Development and administration of a measure to assess adolescents' participation in leisure activities.

This paper describes the development and administration of a measure (a self-report questionnaire) to assess the participation of adolescents in leisure activities. Questionnaire items were generated through a content analysis of focus group interviews with 130 young people aged 12 to 18 years. Specifically, the activities of approximately a thousand adolescents were investigated through a three-factor leisure typology--achievement, social, and time-out leisure--together with the leisure parameters of enjoyment, freedom of choice, and frequency of participation. Further, leisure engagement was examined based on gender and age (i.e., changes in activity participation across the adolescent years). The results are discussed in terms of the practical and theoretical implications of the relationship between gender and age in leisure activity participation.     

The role of albedo and contrast in a test of selective attention

The operation of a selective process was demonstrated under conditions that eliminated exploratory behavior, receptor adjustments, and that could not be construed as abstraction. Ss were given a choice reaction-time test to tachistoscopically exposed stimuli. There were three conditions of brightness and contrast. Four targets equally spaced in brightness units were presented either on a black, a medium gray, or a white background. If a selective process was found to operate, it was hoped to separate the effects of albedo and contrast as factors determining priority in selection. The results confirmed that Ss chose the stimuli of highest contrast, but in the event that contrast was equivalent for two stimuli, the target of highest albedo was chosen significantly more often.     

Rhesus monkeys (<Emphasis Type="Italic">Macaca mulatta</Emphasis>) succeed on a computerized test designed to assess conservation of discrete quantity

Conservation of quantity occurs through recognition that changes in the physical arrangement of a set of items do not change the quantity of items in that set. Rhesus monkeys (Macaca mulatta) were presented with a computerized quantity judgment task. Monkeys were rewarded for selecting the greater quantity of items in one of two horizontal arrays of items on the screen. On some trials, after a correct selection, no reward was given but one of the arrays was manipulated. In some cases, this manipulation involved moving items closer together or farther apart to change the physical arrangement of the array without changing the quantity of items in the array. In other cases, additional items were added to the initially smaller array so that it became quantitatively larger. Monkeys then made another selection from the two rows of items. Monkeys were sensitive to these manipulations, changing their selections when the number of items in the rows changed but not when the arrangement only was changed. Therefore, monkeys responded on the basis of the quantity of items, and they were not distracted by non-quantitative manipulations of the sets.Electronic Supplementary Material Supplementary material is available for this article at