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Biomedical subjects

W R Shadish

Publications and source records attributed to W R Shadish.

At least 19 recordsLinked to original sources
PubMed1998

Preliminary development of the Children's Physical Self-Concept Scale.

The development of a healthy eating style and physical fitness regimen in adolescence or adulthood might be contingent on physical self-concept in childhood. Most available measures of physical self-concept are inappropriate for use with 1st and 2nd grade children, so the present study developed, piloted, and partially validated the 27-item Children's Physical Self-Concept Scale (CPSS), which assesses Global physical self-concept and subscales of Physical Performance, Physical Appearance, and Weight Control behaviors in children 6 to 11 years of age. The test exhibits adequate test-retest reliability and internal consistency. A comparison of 316 normal and overweight children indicated that normal-weight children obtained higher Global physical self-concept scores and higher subscale scores. In addition, the CPSS distinguished test groups of diabetic, overweight, and normal-weight children in a contrasted-groups analysis.

Body Image↗
PubMed1997

How much weight gain occurs following smoking cessation? A comparison of weight gain using both continuous and point prevalence abstinence.

Estimates of postcessation weight gain vary widely. This study determined the magnitude of weight gain in a cohort using both point prevalence and continuous abstinence criteria for cessation. Participants were 196 volunteers who participated in a smoking cessation program and who either continuously smoked (n = 118), were continuously abstinent (n = 51), or who were point prevalent abstinent (n = 27) (i.e., quit at the 1-year follow-up visit but not at others). Continuously abstinent participants gained over 13 lbs. (5.90 kg) at 1 year, significantly more than continuously smoking (M = 2.4 lb.) and point prevalent abstinent participants (M = 6.7 lbs., or 3.04 kg). Individual growth curve analysis confirmed that weight gain and the rate of weight gain (pounds per month) were greater among continuously smoking participants and that these effects were independent of gender, baseline weight, smoking and dieting history, age, and education. Results suggest that studies using point prevalence abstinence to estimate postcessation weight gain may be underestimating postcessation weight gain.

Adult↗
PubMed1997

Outcome, attrition, and family-couples treatment for drug abuse: a meta-analysis and review of the controlled, comparative studies.

This review synthesizes drug abuse outcome studies that included a family-couples therapy treatment condition. The meta-analytic evidence, across 1,571 cases involving an estimated 3,500 patients and family members, favors family therapy over (a) individual counseling or therapy, (b) peer group therapy, and (c) family psychoeducation. Family therapy is as effective for adults as for adolescents and appears to be a cost-effective adjunct to methadone maintenance. Because family therapy frequently had higher treatment retention rates than did nonfamily therapy modalities, it was modestly penalized in studies that excluded treatment dropouts from their analyses, as family therapy apparently had retained a higher proportion of poorer prognosis cases. Re-analysis, with dropouts regarded as failures, generally offset this artifact. Two statistical effect size measures to contend with attrition (dropout d and total attrition d) are offered for future researchers and policy makers.

Adult↗
PubMed1997

Evidence that therapy works in clinically representative conditions.

This article reports a secondary analysis of past therapy outcome meta-analysis. Fifteen meta-analysis provided effect sizes from 56 studies in previous reviews that met 1 of 3 increasingly stringent levels of criteria for clinical representativeness. The effect sizes were synthesized and compared with results from the original meta-analyses. Effect sizes from more clinically representative studies are the same size at all 3 criteria levels as in past meta-analyses. Almost no studies exist that meet the most stringent level of criteria. Results are interpreted cautiously because of controversy about what criteria best capture the notion of clinical representativeness, because so few experiments have tested therapy in clinical conditions, and because other models for exploring the generalizability of therapy outcome research to clinical conditions might yield different results.

Humans↗
PubMed1996

How interchangeable are different estimators of effect size?

The computation of effect sizes is a key feature of meta-analysis. In treatment outcome meta-analyses, the standardized mean difference statistic on posttest scores (d) is usually the effect size statistic used. However, when primary studies do not report the statistics needed to compute d, many methods for estimating d from other data have been developed. Little is known about the accuracy of these estimates, yet meta-analysts frequently use them on the assumption that they are estimating the same population parameter as d. This study investigates that assumption empirically. On a sample of 140 psychosocial treatment or prevention studies from a variety of areas, the present study shows that these estimates yield results that are often not equivalent to d in either mean or variance. The frequent mixing of d and other estimates of d in past meta-analyses, therefore, may have led to biased effect size estimates and inaccurate significance tests.

Electronic Data Processing↗
PubMed1996

Random versus nonrandom assignment in controlled experiments: do you get the same answer?

Psychotherapy meta-analyses commonly combine results from controlled experiments that use random and nonrandom assignment without examining whether the 2 methods give the same answer. Results from this article call this practice into question. With the use of outcome studies of marital and family therapy, 64 experiments using random assignment yielded consistently higher mean post-test effects and less variable posttest effects than 36 studies using nonrandom assignment. This difference was reduced by about half by taking into account various covariates, especially pretest effect size levels and various characteristics of control groups. The importance of this finding depends on (a) whether one is discussing meta-analysis or primary experiments, (b) how precise an answer is desired, and (c) whether some adjustment to the data from studies using nonrandom assignment is possible. It is concluded that studies using nonrandom assignment may produce acceptable approximations to results from randomized experiments under some circumstances but that reliance on results from randomized experiments as the gold standard is still well founded.

Family Therapy↗
PubMed1996

The development of occupational aspirations and expectations among inner-city boys.

The occupational aspirations and expectations of two populations of boys in grades 2, 4, 6, and 8 were examined in order (1) to describe what is unique about the development of job preferences among urban ghetto children who live in settings where many adult males are not well attached to the labor force and (2) to examine 6 reasons for any age- and population-dependent patterns there might be in job aspirations and job expectations. Findings show that boys tend to be more realistic about occupational aspirations and expectations the older they are; that from second grade on the occupational expectations of inner-city boys mirror existing race and class differences in adult job holdings; that the gap between occupational aspirations and expectations is greater for the ghetto boys and remains roughly constant in size across the grades examined; and that the lower occupational expectations of the inner-city boys are strongly related to their lower educational expectations, with these educational expectations being associated with fewer poor boys having a biological father at home and with more of these boys seeing obstacles to success in the local social setting. But, the lower occupational expectations of the ghetto boys are not due to having fewer positive role models or believing that schooling will not pay off for them in the future as it does for others.

Adolescent↗
PubMed1993

Effects of family and marital psychotherapies: a meta-analysis.

This meta-analysis of 163 randomized trials (including 59 dissertations) examines a number of questions not studied in previous syntheses. These include differences in outcome associated with different theoretical orientations, differences between marital and family therapies versus individual therapies, the clinical significance of therapy outcome, differences between marital versus family therapies in both outcomes and problems treated, and the effects of various substantive and methodological moderators of therapy outcome. The review concludes with some observations about the methodological status of this literature.

Clinical Trials as Topic↗
PubMed1992

Laws of war.

Explore the source record for details and available documents.

Communism↗
PubMed1991

Assessing emotional distress at the internist's office.

At their first visits to a clinic, 102 outpatients rated the severity of their presenting complaint, of 12 possible body problems including 6 nonspecific symptoms, of a set of adjustment difficulties, and answered the Welsh A and the Beck Depression inventories. Then, an internist 'blind' to the foregoing answers performed a routine history and physical exam, afterward rating the patient for degree of organic and of psychosomatic involvement. Significant correlations were found between clinician judgments of psychosomatic involvement and patients' self-reported complaints on all assessment measures (smallest r = 0.25, P less than 0.01). Substantial intercorrelations were found among the assessment measures, especially between Welsh A (Anxiety) and Beck Depression scores (r = 0.73).

Affective Symptoms↗
PubMed1991

Mediators and moderators in meta-analysis: there's a reason we don't let dodo birds tell us which psychotherapies should have prizes.

In primary studies, psychotherapy researchers frequently search for mediator and moderator variables that can help them understand the relationship between treatment and outcome. Yet a review of past psychotherapy meta-analyses revealed that none examined the possible role of mediator variables; and although all of them searched for moderators of study outcome, that search was generally not as complete as it could have been. This article illustrates methods for studying such mediator and moderator variables in meta-analysis, discusses their advantages and disadvantages, and shows how the inclusion of these variables can change interpretation of meta-analytic results. In particular, the perennial interpretation of past psychotherapy meta-analyses that therapeutic orientation makes no difference to outcome--or as the dodo bird put it: "Everyone has won and all must have prizes"--may be wrong. Orientation may make significant difference, but only by virtue of its moderating and mediating effects.

Adaptation, Psychological↗
PubMed1989

Leisure interest patterns and subjective stress in college students.

A first study of the Leisure Interests Checklist (LIC) is reported based on a large (N = 670) normative sample of college students. Acceptable reliability was found on the total interest scores, and on both rationally- and factorially-derived LIC subscales. The BAROMAS stress scales were also studied concurrently with the same college students, and normative data are provided from that sample. Interest in very active diversions and Sports on the LIC did correlate with confidence in doing sports on the BAROMAS. Otherwise, the two instruments showed little overlap. Comparisons between ethnic and gender groupings mainly agreed with advance expectations by disclosing culturally conventional differences in response patterns. The LIC appears promising for future use in both applied and research contexts.

Adaptation, Psychological↗
PubMed1989

Private-sector care for chronically mentally ill individuals. The more things change, the more they stay the same.

Two profit-making industries, nursing homes and board-and-care homes, care for about one million chronic mental patients. This care is primarily custodial and probably not very different from the care patients received in the public sector prior to deinstitutionalization. Moreover, certain characteristics of privately owned facilities encourage poor patient care so as to maximize profit. The problem could be ameliorated if chronic mental patients were strong and informed consumers or if the public sector strongly regulated proprietary care. However, neither of these two conditions now hold. Perhaps the apparent difficulties in significantly improving care for chronically mentally ill individuals despite seemingly major changes in policy reflect a fundamental problem in overall social policy--a reluctance to care for chronically indigent individuals of all kinds.

Chronic Disease↗
PubMed1984

The social integration of psychiatric patients in nursing homes.

The authors explored self-reports of the social integration of 163 chronically ill psychiatric patients who were admitted to 12 nursing homes over a 1-year period. Results suggest that nursing home care for psychiatric patients is custodial and institutional in character and that the social integration of such patients is generally low. Nursing home patients had lower scores than outpatients but not inpatients on a measure of social participation; they were similar to both these groups on measures of spending and employment. Levels of social integration changed little over 1 year, either for better or for worse.

Adolescent↗
PubMed1982

Criteria for success in deinstitutionalization: perceptions of nursing homes by different interest groups.

Studies of deinstitutionalization often use a limited set of criteria by which to judge success. Social integration and recidivism, for example, are particularly popular criteria. Yet such criteria may not reflect the diverse settings in which community care occurs, nor the diverse views of success held by different interest groups. The present study presents a methodology for developing more comprehensive criteria for evaluating social programs, including deinstitutionalization. The methodology is illustrated by analyzing the perceptions of different interest groups about the nature of successful care for mental patients in nursing homes.

Attitude of Health Personnel↗