Suppressing the truth as a mechanism of deception: Delta plots reveal the role of response inhibition in lying

Lying takes more time than telling the truth. Because lying involves withholding the truth, this “lie effect” has been related to response inhibition. We investigated the response inhibition hypothesis of lying using the delta-plot method: A leveling-off of the standard increase of the lie effect with slower reaction times would be indicative of successful response inhibition. Participants performed a reaction-time task that required them to alternate between lying and truth telling in response to autobiographical questions. In two experiments, we found that the delta plot of the lie effect leveled off with longer response latencies, but only in a group of participants who had better inhibitory skills as indexed by relatively small lie effects. This finding supports the role of response inhibition in lying. We elaborate on repercussions for cognitive models of deception and the data analysis of reaction-time based lie tests.     

The effect of methylphenidate on three forms of response inhibition in boys with AD/HD

The current study was aimed at (a) investigating the effect of three doses methylphenidate (MPH) and placebo on inhibition of a prepotent response, inhibition of an ongoing response, and interference control in Attention Deficit/Hyperactivity Disorder (AD/HD), and (b) studying dose-response relations for the three forms of response inhibition. To meet these aims, the following tasks were selected: two versions of the Stop Paradigm for inhibition of a prepotent response, a Circle Tracing Task and a recently developed Follow Task for inhibition of an ongoing response, and the Stroop Color-Word Test and an Eriksen Flanker Task for interference control. These tasks were administered to 23 boys with AD/HD during four treatment conditions: 5 mg MPH, 10 mg MPH, 20 mg MPH, and placebo. A pseudorandomized, multiple-blind, placebo-controlled, within-subject design was used. As hypothesized, inhibitory control in children with AD/HD improved under MPH compared to placebo. However, this effect was only significant for inhibition of a prepotent response and inhibition of an ongoing response (as measured by the Follow Task), but not for interference control. The relation between treatment condition and response was linear. However, this linear relation was due to improved inhibitory control under MPH compared to placebo, because no effects of MPH dose were observed for any of the response inhibition measures.     

Combined expectancies: event-related potentials reveal the early benefits of spatial attention that are obscured by reaction time measures

Visual spatial attention has been likened to a "spotlight" that selectively facilitates the perceptual processing of events at covertly attended locations. However, if participants have advance knowledge of the likely location of an impending target and the likely response it will require, facilitation in response performance does not occur for targets at the expected (or attended) location that require an unexpected response. Event-related potentials (ERPs) were recorded during a discrimination task in which the most likely target location and target response were simultaneously cued prior to target onset. The ERPs showed evidence of enhanced perceptual-level processing for all targets at attended locations. These results suggest that the lack of response facilitation for unexpected targets at attended locations is likely due to postperceptual processes that are activated by the inclusion of nonspatial stimulus expectancies, response expectancies, or both.     

Cultural differences in survey responding: Issues and insights in the study of response biases

This paper introduces the special section “Cultural differences in questionnaire responding” and discusses central topics in the research on response biases in cross‐cultural survey research. Based on current conceptions of acquiescent, extreme, and socially desirable responding, the author considers current data on the correlated nature of response biases and the conditions under which different response styles they emerge. Based on evidence relating different response styles to the cultural dimension of individualism‐collectivism, the paper explores how research presented as part of this special section might help resolves some tensions in this literature. The paper concludes by arguing that response styles should not be treated merely as measurement error, but as cultural behaviors in themselves.     

Response inhibition in children with DSM-IV subtypes of AD/HD and related disruptive disorders: the role of reward.

The current study had four aims: (a) to replicate previous findings of slow response inhibition in Attention Deficit/Hyperactivity Disorder (AD/HD), (b) to explore whether poor response inhibition in children with AD/HD is a core problem or rather a result of an underlying problem related to reward, (c) to investigate the specificity of poor response inhibition and the role of reward in relation to AD/HD, and (d) to study whether findings would be different for three subtypes of AD/HD. In order to address these issues, a stop paradigm was administered under a reward condition and under a nonreward condition to an AD/HD group (n=24), an Oppositional Defiant Disorder (ODD)/Conduct Disorder (CD) group (n=21), a comorbid AD/HD+ODD/CD group (n=27), and a normal control (NC) group (n=41). Firstly, contrary to prediction, none of the Disruptive Behavior Disorder (DBD) groups differed from the NC group with respect to the speed of the inhibition process. Secondly, it was shown that children with AD/HD and children with comorbid AD/HD+ODD/CD, but not children with ODD/CD alone, slowed down more dramatically in the reward condition than normal controls. This finding was interpreted as a strategy to increase the chance of being rewarded in children with AD/HD and children with comorbid AD/HD+ODD/CD, but not in children with pure ODD/CD. Finally, analysis of AD/HD subtypes did not change the main findings of this study.     

Group and individual change in the treatment of drug addictions: a follow-up study in therapeutic communities

The pre-post treatment change of 112 patients in two therapeutics Spanish communities is described. The Addiction Severity Index (ASI) was used at intake and at the end of the treatment program. Results of the treatment program were evaluated by applying composite scores (CS) of the ASI, and the evolution of each patient was evaluated using the Reliable Change Index (RCI). 69.7% of the sample completed treatment, and 30.3% dropped out prematurely. At intake, the percentage of people who could improve in the different areas of the ASI ranged between 35.1% for alcohol consumption and 95.3% for family relationships. At the follow-up, the percentage of subjects who showed significant statistical improvements in the different areas varied between 7.9% in family relations and 66.7% in alcohol consumption. The percentage of patients who deteriorated was less than 10% for all variables. Implications for further research and clinical practice are commented upon.     

Toward an understanding of the relationships among organizational change, individual differences, and changes in person-environment fit: a cross-level study

Organizational behavior literature has not typically viewed person-environment (P-E) fit as an outcome of change. Whereas the study of antecedents to employees' fit with their work environment has largely been restricted to the selection and socialization of newcomers, this study examines individuals' perceptions of changes in P-E fit in relation to organizational changes occurring in 34 different organizational work units. Results suggest that the relationships between organizational change and perceived changes in fit are best understood as interactions between the characteristics of the change process, the extent of change, and individual differences. Both age and mastery orientation related to perceived changes in P-E fit through interactions with aspects of the change process.     

The role of inhibitory control and ADHD symptoms in the occurrence of involuntary thoughts about the past and future: An individual differences study

In everyday life, people often experience involuntary thoughts about their personal past and future events in response to incidental cues in the environment. Yet, despite the abundance of such cues, our consciousness is not constantly flooded by these involuntary autobiographical memories (IAMs) and involuntary future thoughts (IFTs). The main goal of the present study was to further investigate the possibility that cognitive inhibitory control keeps these involuntary cognitions at bay. To test this inhibition hypothesis, we conducted a large-scale study (n = 157) in which groups of participants with different levels of inhibitory control (low, medium, high) and individuals with ADHD spectrum symptoms were engaged in a laboratory vigilance task in which the frequency of IFTs and IAMs was assessed. Contrary to predictions, although participants across groups differed significantly in terms of their individual inhibitory control capacity, the number of IFTs and IAMs reported during the vigilance task was comparable. In addition, individuals with the ADHD spectrum symptoms did not report more spontaneous thoughts compared to other groups. Together, these findings lend little support for the idea that inhibition is a key mechanism that regulates the occurrence of IAMs and IFTs in everyday life. Other possible mechanisms and avenues for future research are discussed.     

Predicting individual change in personality disorder features by simultaneous individual change in personality dimensions linked to neurobehavioral systems: the longitudinal study of personality disorders

Personality disorders (PDs), long thought to be immutable over time, show considerable evidence of individual change and malleability in modern prospective longitudinal studies. The factors responsible for the evident individual change in PDs over time, however, remain essentially unknown. A neurobehavioral model that posits negative emotion (NEM), nonaffective constraint (CON), communal positive emotion (PEM-C), and agentic positive emotion (PEM-A) as important systems underlying PD provides a theoretical basis for investigating predictors of change in PD features over time. Thus, in this study, the authors investigated how individual change in NEM, CON, PEM-C, and PEM-A over time predicted individual change in PD features over time, using longitudinal data on PD assessed by the International Personality Disorders Examination (A. W. Loranger, 1999), as well as data on normal personality features gathered within a 4-year prospective multiwave longitudinal study (N = 250). The authors used the method of latent growth modeling to conduct their analyses. Lower initial levels of PEM-C predicted initial levels of the growth trajectories for those with elevated Cluster A PD features. Elevated NEM, lower CON, and elevated PEM-A initial levels were found to characterize the initial levels of growth trajectories for those with increased Cluster B PD features. Interestingly, subjects with higher initial levels of PEM-A revealed a more rapid rate of change (declining) in Cluster B PD features over time. Elevated NEM and decreased PEM-C initial levels were found to characterize the growth trajectories for subjects with increased Cluster C PD features. The substantive meaning of these results is discussed, and the methodological advantages offered by this statistical approach are also highlighted.     

Social representations used by the parents of Mexican adolescent drug users under treatment to explain their children's drug use: gender differences in parental narratives

The aim of this study was to explore the social representations used by the parents of adolescent drug users to explain the onset of drug use. Differences in explanations between the parents of male and female adolescents were also explored. Sixty parents who accompanied their children to four rehabilitation centers in 2004 completed two semi-structured questionnaires. In addition, indepth interviews were applied to a subsample. The explanation of the drug use was carried out through two social representations: the neglectful family and the son or daughter as an inexperienced teen. The parents-son model was well structured; however, the parents-daughter was unstructured, which suggests a higher resonance in the familial group.     

Functional significance of psychological variables that are included in the Theory of Planned Behaviour: a Self-Determination Theory approach to the study of attitudes,subjective norms,perceptions of control and intentions

The Theory of Planned Behaviour was proposed by Ajzen (1985) in an attempt to expand the applicability of the Theory of Reasoned Action (TRA) to situations where behaviour is not under complete volitional control. However, recent research does not address the issue of the stability of intentions, yet this is considered a boundary condition of the TRA on theoretical grounds. Therefore, the purposes of the present article were, first, to make a theoretical approach to the study of the stability of behavioural intentions by discussing assumptions underlying self-determination theory. Second, because, according to self-determination theory (Deci & Ryan, 1985), stability of intentions is related to the functional significance of psychological events, investigation of the functional significance of attitudes, subjective norms and perceived behavioural control was attempted through a study dealing with leisure-time physical activity. Because investigation of functional significance requires instruments assessing behavioural regulations, instrument development took place. Results partially supported the validity of behavioural regulations with respect to leisure-time physical activity. Furthermore, subjective norms were found to represent only the controlling dimension of functional significance. Attitudes and perceived behavioural control were found to represent both the controlling and informational dimensions of functional significance. Results are discussed in relation to assumptions underlying the Theories of Reasoned Action and Planned Behaviour and the Theory of Trying. Implications for theory development are made. © 1998 John Wiley & Sons, Ltd.     

Functional activity in the brain of socially deprivated rats produced by an active avoidance test after razobazam (Hoe 175) treatment: a 2-deoxyglucose study

The 2-deoxyglucose (2-DG) autoradiographic method was used to map metabolic activity in the brain of socially deprivated rats during an active avoidance test. The method investigated the effects of razobazam during this learning test. The animals were socially deprivated for 5 weeks. On the first experimental day the animals were trained to avoid a footshock by jumping onto a platform. During training and testing, the total number of avoidance responses was scored. On the second day during one 2-DG session of 40 min, razobazam increased the avoidance score by 18% as compared to controls. Autoradiographs were analyzed using a two-dimensional densitometric method. The analysis of the brain structures showed a 22% reduction of optical density in the nucleus habenularis lateralis, a 25% increase in the caudal part of the nucleus accumbens, and a 13% increase in the frontal cortex in rats treated with razobazam, but no change in the amygdala. These results provide a preliminary concept to explain how the new compound razobazam produced a better learning performance in socially deprivated rats.     

Samoan adolescents in American Samoa and Hawaii: Comparison of youth violence and youth development indicators: A study by the Asian/Pacific Islander Youth Violence Prevention Center

Samoan youths are critically under-studied in research on youth violence prevention and adolescent development. When Samoan adolescents are included in research investigations, they are typically obscured into the much larger aggregated categories of “Pacific Islanders” or “Asian Americans and Pacific Islanders.” The present study is one of the first to examine Samoans exclusively and compare the differences between Samoan youths residing in American Samoa and those residing in Hawaii. In an effort to gauge the acculturative processes of adolescents in American Samoan and Hawaii, the present study compared these two groups' self-reports of violence, substance use, grade-point average, scholastic aspirations, importance of religion, ethnic identity, parenting discipline style, and family support. Overall, the results indicated higher rates among Samoan adolescents in Hawaii as compared to those in American Samoa on one violence item and on substance use indicators (i.e., alcohol and marijuana). Samoan adolescents in American Samoa also reported higher levels of protective factors related to the importance of religion (especially for girls), ethnic identity, and family support. However, Samoan adolescents in Hawaii had higher scholastic aspirations than those in American Samoa, despite having lower grade-point averages. In general, Samoan students who did not self-report engaging in violence had higher rates of protective factors as compared to those who indicated engaging in violence. Statistically significant interactions reflected more complex effects. The implications of these findings in conjunction with the results of the Youth Risk Behavior Survey (YRBS) are discussed in the context of Samoan culture, acculturation, and youth development.