Cue-induced craving for marijuana in cannabis-dependent adults.

Recent interest in the development of medications for treatment of cannabis-use disorders indicates the need for laboratory models to evaluate potential compounds prior to undertaking clinical trials. To investigate whether a cue-reactivity paradigm could induce marijuana craving in cannabis-dependent adults, 16 (eight female) cannabis-dependent and 16 (eight female) cannabis-na?ve participants were exposed to neutral and marijuana-related cues, and subsequent changes in mood, self-reported craving, and physiologic function were assessed. Significant Group X cue interactions were found on all three VAS craving indices as well as on the Compulsivity scale of the Marijuana Craving Questionnaire-Brief Form (MCQ-BF). Cannabis-dependent individuals responded to marijuana-related cues with significantly increased reports of marijuana craving compared to neutral cue exposure, although there were no cue-induced changes in any of the physiological measures. There were no significant gender differences on any of the measures. These results indicate that marijuana craving can be induced and assessed in cannabis-dependent, healthy adults within a laboratory setting, and support the need for further research of the cue reactivity paradigm in the development of medications to treat cannabis-use disorders. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Cue reactivity in cannabis-dependent adolescents.

The authors measured event-related potentials with a craving manipulation to investigate the neural correlates of drug cue reactivity in 13 adolescents who are cannabis dependent (CD; ages 14–17). The P300 responses to marijuana (MJ) pictures (MJ-P300) and control pictures (C-P300) were assessed after handling neutral objects and again after handling MJ paraphernalia (MJP). Self-reported drug craving and heart rates also were measured. MJ-P300 were larger than C-P300 (p p = .002 and p = .003, respectively), with no association between the magnitude of craving and MJ-P300. Heart rates were not affected by handling MJP. The results showed that adolescents who are CD have an attentional bias to MJ stimuli that increases after handling marijuana paraphernalia. Generally, the results are consistent with what has been reported for adult heavy chronic cannabis smokers, although there were some differences that require further investigation. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Development of a decisional balance scale for young adult marijuana use.

This study describes the development and validation of a decisional balance scale for marijuana use in young adults. Scale development was accomplished in four phases. First, 53 participants (70% female, 68% freshman) provided qualitative data that yielded content for an initial set of 47 items. In the second phase, an exploratory factor analysis on the responses of 260 participants (52% female, 68% freshman) revealed two factors, corresponding to pros and cons. Items that did not load well on the factors were omitted, resulting in a reduced set of 36 items. In the third phase, 182 participants (49% female, 37% freshmen) completed the revised scale and an evaluation of factor structure led to scale revisions and model respecification to create a good-fitting model. The final scales consisted of 8 pros (α = 0.91) and 16 cons (α = 0.93), and showed evidence of validity. In the fourth phase (N = 248, 66% female, 70% freshman), we confirmed the factor structure, and provided further evidence for reliability and validity. The Marijuana Decisional Balance Scale enhances our ability to study motivational factors associated with marijuana use among young adults. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Some effects of combining psychological tests on clinical inferences.

The study was designed to determine whether the reliability and validity of interpretations based on 3 frequently used psychological tests—Rorschach, TAT, MMPI—increased as a function of number of tests employed. 30 clinical psychologists completed personality questionnaires describing 5 Ss on the basis of identifying data alone, each test individually, pairs of tests, and all 3 combined. Reliability and validity did not increase as a function of number of tests, nor were there any differences between tests or pairs of tests. The validity scores for test data ranged from 66% to 73%, with a Mean of 68%. The reliability scores ranged from 56% to 72%, with a Mean of 64%. (18 ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Confirmatory Factor Structure and Measurement Invariance of the Memory Compensation Questionnaire.

Recent research with the Memory Compensation Questionnaire (MCQ) has examined changes, functions, and correlates of compensatory strategy use in older adults. The twofold aim of this study was to test (a) the hypothesized structure of the MCQ and (b) structural equivalence across age, gender, and time. The 7-scale MCQ was designed to measure 5 compensatory mechanisms and 2 general aspects of compensatory awareness. The authors assembled a 3-wave (6-year) sample (N=521; age=55-85 years) from the Victoria Longitudinal Study. The results of structural equation modeling supported (a) the a priori structure of the MCQ and (b) the inference of measurement invariance across the 3 dimensions. Accordingly, the MCQ is available for measuring self-reported efforts to compensate for everyday memory losses. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Proposed scoring changes for the Strong Vocational Interest Blank.

A study of the effect of replacing with new items 102 items in the current SVIB on the validity and reliability of the SVIB. 8 occupational groups were used. The results showed that the validity and reliability remained essentially the same after dropping the items. Also, the weighting system of the SVIB was compared with scales using unit weights. The results indicated that the unit weights keys were virtually identical to the weighted keys on 3 criteria: validity, reliability, and scale intercorrelations. Thus, the SVIB when revised should be scored using unit weight scales. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

On the discriminative validity of a family history of problem drinking index with a national sample of young adults

OBJECTIVE: This study used data from the National Longitudinal Survey of Youth (NLSY) to test hypotheses relevant to the discriminative validity of a trichotomous family history of problem drinking index. Early onset substance use, adolescent antisocial behaviors and lifetime alcohol and illicit drug use were used as criterion variables. METHOD: Prospective, longitudinal survey data from over 9,000 young adult subjects (ages 23-30 yrs) in the NLSY archive were used to evaluate several hypotheses regarding familial risk of alcoholism. RESULTS: General support for discriminant validity was indicated, as the high density familial risk group differed from the moderate (paternal or maternal problem drinking only) and low-risk groups with regard to a somewhat earlier onset of marijuana use, higher levels of antisocial behaviors in adolescence (especially substance-related offenses and property offenses) and higher levels of lifetime marijuana and cocaine use. The high- and moderate-risk groups differed from the low-risk group with regard to alcohol use and alcohol-disordered problems (e.g., negative consequences, dependency symptoms). CONCLUSIONS: Risk associated with high familial problem-drinking density includes an earlier onset of illicit substance use, higher rates of lifetime marijuana and cocaine use and more frequent adolescent antisocial behavior. The general pattern of the findings was robust for men and women and suggests that high-risk status may reflect both a high genetic loading and a high environmental risk loading.     

Development and validation of a modified version of the Peritraumatic Dissociative Experiences Questionnaire.

This article reports results from 3 studies conducted to develop and validate a modified version of the self-administered form of the Peritraumatic Dissociative Experiences Questionnaire (PDEQ; C. R. Marmar, D. S. Weiss, & T. J. Metzler, 1997). The objective was to develop an instrument suitable for use with persons from diverse ethnic and socioeconomic backgrounds. In Study 1, the original PDEQ was administered to a small sample (N=15) recruited from among men admitted to the hospital for physical injuries stemming from exposure to community violence. Results led to modifications aimed at improving the utility of the instrument. In Study 2, the modified PDEQ was subjected to structural equation modeling and item response theory analyses to assess its psychometric properties in a larger, primarily male, sample of community violence survivors (N=294). In Study 3, the reliability and validity of the modified instrument were further assessed in a sample of female survivors of sexual assault (N=90). Results attest to the psychometric properties as well as the reliability and validity of the modified 8-item PDEQ. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Cue reactivity in young marijuana smokers: A preliminary investigation.

To develop and evaluate the feasibility of a cue reactivity paradigm for young marijuana smokers, the authors set up a laboratory procedure involving neutral and marijuana-related imagery, video, and in vivo cues. Fifteen adolescents and young adults with cannabis use disorders completed the procedure, which included continuous measurement of skin conductance and heart rate. Participants also completed questionnaires regarding marijuana craving before, during, and after cue presentations. Higher levels of craving and skin conductance were observed during marijuana cue presentations. The procedure appears to elicit cue reactivity among adolescents and young adults with cannabis use disorders and should be further evaluated and refined with a larger sample. Implications for future studies are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Development of the trauma play scale: An observation-based assessment of the impact of trauma on play therapy behaviors of young children.

The purpose of this study was to develop an instrument designed to detect differences in the play therapy behaviors of children with a history of trauma versus children with no known history of trauma. The scale was designed so that raters could rate a child's behavior, via videotaped play therapy sessions, at five minute intervals. The scale consisted of the following domains: Intense Play, Repetitive Play, Play Disruptions, Avoidant Play Behavior, and Negative Affect. The scale was evaluated in terms of inter- and intrarater reliability and known-group discriminant validity. Subjects were twelve children; six had a history of trauma and six had no known trauma history. Eight consecutive videotaped play therapy sessions were blind rated for each participant by trained raters. One way analysis of variance, including effect sizes, was used to detect differences between the groups. Percentage agreement and correlational estimates of interrater reliability suggested that raters are able to achieve consensus and consistency in their ratings. Statistical analyses indicated that the Trauma Play Scale has a high degree of discriminant validity. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The Autonomy Over Smoking Scale.

Our goal was to create an instrument that can be used to study how smokers lose autonomy over smoking and regain it after quitting. The Autonomy Over Smoking Scale was produced through a process involving item generation, focus-group evaluation, testing in adults to winnow items, field testing with adults and adolescents, and head-to-head comparisons with other measures. The final 12-item scale shows excellent reliability (αs = .91–.97), with a one-factor solution explaining 59% of the variance in adults and 61%–74% of the variance in adolescents. Concurrent validity was supported by associations with age of smoking initiation, lifetime use, smoking frequency, daily cigarette consumption, history of failed cessation, Hooked on Nicotine Checklist scores, and Diagnostic and Statistical Manual of Mental Disorder (4th ed., text rev.; American Psychiatric Association, 2000) nicotine dependence criteria. Potentially useful features of this new instrument include (a) it assesses tobacco withdrawal, cue-induced craving, and psychological dependence on cigarettes; (b) it measures symptom intensity; and (c) it asks about current symptoms only, so it could be administered to quitting smokers to track the resolution of symptoms. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Large-sample confidence intervals for validity and reliability coefficients.

Large-sample confidence intervals (CI) for reliability, validity, and unattenuated validity are presented. The CI for unattenuated validity is based on the Bonferroni inequality, which relies on one CI for test–retest reliability and one for validity. Covered are four reliability–validity situations: (a) both estimates were from random samples; (b) reliability was from a random sample but validity was from a selected sample; (c) validity was from a random sample but reliability was from a selected sample; and (d) both estimates were from selected samples. All CIs were evaluated by using a simulation. CIs on reliability, validity, or unattenuated validity are accurate as long as selection ratio is at least 20% and selected sample size is 100 or larger. When selection ratio is less than 20%, estimators tend to underestimate their parameters. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Psychometric properties of the Minnesota Eating Behavior Survey in Canadian university women.

The Minnesota Eating Behavior Survey (MEBS) is a 30-item questionnaire for longitudinal assessment of disordered eating symptoms among community children and adults. This cross-validation study evaluated the MEBS's psychometric properties among 423 Canadian university women. Generally, we observed satisfactory internal consistency reliability and convergent and discriminant validity, although performance of the Compensatory Behavior subscale was relatively weak. Further, we observed acceptable congruence with the original factor structure in this sample, but confirmatory factor analysis indicated the original factor structure fit these data poorly. An alternative model is presented. We interpret these mixed results as largely supporting the MEBS's reliability and validity as a brief measure of disordered eating symptoms among female undergraduates. Further evaluation of its factor structure is needed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Development of the OCDS-Revised: A Measure of Alcohol and Drug Urges With Outpatient Substance Abuse Clients.

Urges to use substances is an important construct in understanding the maintenance of substance use as well as relapse. There is a need to evaluate single instruments measuring global urges to use substances (including alcohol). The Obsessive Compulsive Drinking Scale (OCDS; R. F. Anton, D. H. Moak, & P. Latham, 1995) was revised and tested as a single measure of urges to use substances. Participants were 252 adults entering outpatient substance abuse treatment. Results suggest that the revised scale (OCDS-R) primarily assesses 1 global factor for urges to use substances. In addition, strong support was found for the reliability and concurrent validity of the OCDS-R, although results for its predictive validity were mixed. The OCDS-R is a brief, psychometrically sound self-report instrument that has applicability within clinical and research settings. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Validating a five-factor marijuana motives measure: Relations with use, problems, and alcohol motives.

This study adapted and extended M. L. Cooper's (1994) Drinking Motives Measure to examine marijuana motives among 299 college students. An exploratory factor analysis supported the hypothesized 5-factor marijuana motives model, resulting in enhancement, conformity, expansion, coping, and social motives. Analyses supported the internal consistency and concurrent validity of the 5 marijuana motives. Marijuana motives were significant predictors of marijuana use and added to the prediction of use-related problems above and beyond the contribution of lifetime use. Motives and gender interacted in predicting use and use-related problems. Parallel regression analyses revealed that marijuana and alcohol motives predicted comparable amounts of variance in use and use-related problems. However, different patterns of relations emerged across drugs, supporting the discriminant validity of the marijuana and alcohol motives. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Developing a measure of sluggish cognitive tempo for children: Content validity, factor structure, and reliability.

Sluggish cognitive tempo (SCT) is a construct that some researchers believe may be extremely useful in understanding the inattentive subtype of attention-deficit/hyperactivity disorder, and may even help define a completely new disorder. However, the construct of SCT is as yet inadequately operationally or theoretically defined. The authors took the first steps toward developing an empirically supported measure of SCT in children. In Study 1, potential items to measure SCT were identified from a literature review, content validity of the items was evaluated by a group of experts, and a preliminary set of SCT items were selected. In Study 2, ratings completed by parents and teachers of 335 children (ages 4–13) were used to further develop and evaluate the SCT items by computing factor analyses, item-level analyses, reliability analyses, and preliminary validity analyses. The final SCT scale (14 items) produced a total scale score and 3 subscale scores: Slow, Sleepy, and Daydreamer. These scales were constructed with good content validity and were found to have strong reliability. Future directions include replication, extension into a clinical population, and further examination of validity. (PsycINFO Database Record (c) 2010 APA, all rights reserved)