Measuring social desirability bias: Do the full and short versions of the Marlowe-Crowne Social Desirability scale matter?

Given the sensitive nature of ethics research, the presence of social desirability bias (SDB) threatens the validity of research findings. As ethics studies often overlook this bias, we aimed to provide evidence that SDB varies across individual and situational factors. We thus investigated the influence of socio-demographic factors and survey modes on SDB. A total of 348 working adults were randomly chosen to participate in either an on-line or off-line survey containing eight versions of the Marlowe-Crowne Social Desirability (MCSD) scale. The reliabilities for the eight versions ranged from 0.35 to 0.81. Statistical tests revealed that different socio-demographic factors influence different versions of the MCSD scale. The results also showed that using on-line surveys minimizes SDB. This study provides practical implications and suggestions for future research.

Misreporting Weight and Height Among Mexican and Puerto Rican Men

Most obesity prevalence data rely on self-report, which typically differs when compared to objectively measured height, weight, and body mass index (BMI). Given that Latino men have high rates of obesity in the United States and demonstrate greater misreporting compared to Caucasian men, examining the factors that contribute to misreporting among Latino men is warranted. This study examined BMI, Latino ethnic background (Mexican or Puerto Rican), and social desirability in relation to misreporting of BMI, as defined as the discrepancy between self-reported and measured height and weight, in Latino men. Participants were 203 adult Mexican and Puerto Rican men, average age 39.41 years, who participated in a larger study. Participants self-reported their weight and height, had their weight and height objectively measured, and completed a measure of social desirability. Measured BMI was the strongest predictor of misreporting BMI, such that the greater the participants' BMI, the greater the discrepancy in BMI (p < .001). Misreporting of BMI did not vary based on ethnic background, and measured BMI did not moderate the relationship between social desirability and misreporting of BMI. When normative error was distinguished from misreporting in post-hoc analyses, results showed that only 34.5% of participants demonstrated misreporting. Findings highlight the importance of identifying normative error when examining misreporting in order to improve the accuracy of self-reported BMI data. Future research on misreporting for Latino men should include weight awareness, acculturation, and length of U.S. residency as these variables may be related to self-reported weight and height.

Social desirability dimensionality: one or two continua?

Background

The objective of this paper is to examine the structure of social desirability. This variable is important in self-report question-naires. Theoretical analyses indicate the existence of at least two dimensions of this construct, but there is no unambiguous em-pirical evidence for such a structure of social desirability. The present research aimed to determine the factor structure of the social desirability construct and the number of its dimensions.

Participants and procedure

The inductive research strategy was applied and a new pool of questionnaire items was generated. This approach allows for detachment from the existing social desirability assessment instruments. This study focuses on the concepts of social desirability that examinees have, rather than on the content of existing items measuring social desirability. The verification of the social de-sirability structure was performed in three stages. At each stage, the number of items was gradually reduced. The successive phases of the study involved three different samples, respectively, consisting of 657, 415, and 1,709 examinees.

Results

Initially, at the first stage of the study, two dimensions were detected, but in the two subsequent stages, the second dimension represented acquiescence. The procedure of partialling the mean out of the correlation matrix was applied to eliminate acquies-cence. This dimension is related, as expected, to agreeableness and conscientiousness. It also appeared that the social desirability structure can be confounded by acquiescence in longer questionnaires.

Conclusions

It is concluded that every item reflects both social desirability and acquiescence, albeit to different extents. A one-dimensional construct of social desirability was finally obtained.