Abstract
The Regan Attitudes Toward Non-Drinkers Scale (RANDS) is a relatively new alcohol-related measure. Findings suggest that higher scores on the RANDS (denoting stronger endorsement of negative beliefs about non-drinkers) are related to higher self-reported levels of alcohol consumption. Available evidence also suggests that the measure is factorially unidimensional and possesses good scale score reliability (α coefficients > .80) and construct validity. However, the test–retest stability and predictive validity of the RANDS have not been investigated. The current study addressed this omission by distributing the scale to 120 Irish university students at two points in time (1 to 4 weeks apart). To examine the validity of the RANDS, other measures (e.g., alcohol consumption, motives to drink alcohol, and sensation-seeking), commonly employed in studies of drinking behavior, were used. Results indicated that the intraclass correlation coefficient (ICC) for the total RANDS was substantial (.86), suggesting it is a stable measure of attitudes toward non-drinkers. Scores on the RANDS correlated significantly with self-reported alcohol consumption, binge-drinking, and motives to drink. Finally, regression analyses demonstrated that the RANDS, measured at Time 1, accounted for unique variance in risky drinking measured at Time 2.
Keywords
The Regan Attitudes Toward Non-Drinkers Scale (RANDS; Regan & Morrison, 2011) was developed to address a gap in the literature whereby individuals may consume alcohol to avoid the social costs attributed to being a non-drinker. To date, the RANDS has been used in several published studies (e.g., Regan & Morrison, 2011, 2013). Findings suggest that those who score highly on the RANDS—denoting stronger endorsement of negative attitudes toward non-drinkers—tend to consume greater quantities of alcohol more frequently. Among Irish-based respondents, this construct also has been associated more consistently with self-reported alcohol consumption than variables routinely assessed in alcohol research such as sensation-seeking and peer pressure.
The results of these studies suggest that the RANDS possesses good psychometric characteristics. A single-factor solution, with all items relating to the concept of the
In multiple studies, with diverse samples (Regan & Morrison, 2011, 2013, 2016), scale score reliability has been good, with 95% confidence intervals (CIs) for Cronbach’s alpha suggesting that alpha coefficients less than .80 are unlikely to occur. However, due to the relatively recent emergence of attitudes toward non-drinkers as a psychological construct, other forms of psychometric assessment, in particular test–retest reliability and predictive validity, have not been conducted on the RANDS.
Reliability Testing: Test–Retest
A critical, though routinely overlooked, dimension of reliability is test–retest (see Charter, 2003; Hubley, Zhu, Sasaki, & Gadermann, 2014; Weafer, Baggott, & de Wit, 2013). Findings from a prevalence study in 2000 found that while internal consistency, which was estimated using Cronbach’s alpha, was assessed in over two thirds of the studies reviewed, less than 20% of the studies reported test–retest reliability (Hogan, Benjamin, & Brezinski, 2000). The scarcity of studies utilizing a test–retest design is due, in part, to the resource intensiveness necessary to undertake administration to the same participants on multiple occasions.
Limiting assessment of reliability to Cronbach’s alpha provides no information on the temporal stability of participants’ responses (Weng, 2004). The reliability of a measurement tool across multiple time points—during which the influence of measurement error on participants’ responses is assessed (Weng, 2004)—is a key element of a scale’s psychometric integrity, as inconsistent measures of participants’ responses may result in misleading scientific conclusions (Krosnick & Berent, 1993; Weir, 2005). Given the RANDS’ status as a newly developed scale assessing a novel construct, detailed information is needed with regard to psychometric characteristics such as test–retest reliability (de Zwart, Frings-Dresen, & Van Duivenbooden, 2002).
Predictive Validity
All of the published research using the RANDS (e.g., Regan & Morrison, 2011, 2013) has relied on concurrent self-report data. Thus, the present study offers new information about the predictive validity of the RANDS by investigating the correlations between scores on this measure, taken at Time 1, and risky drinking behavior, taken at Time 2.
Rationale
The objectives of this study were threefold. First, the test–retest reliability (i.e., temporal stability) of the RANDS was evaluated. Second, the predictive validity of the RANDS was ascertained by investigating whether scores on this scale (measured at Time 1) could predict alcohol consumption (measured at Time 2). Third and finally, the practical significance of the RANDS was scrutinized by gauging whether attitudes toward non-drinkers would account for incremental variance in alcohol consumption, when factors commonly assessed by researchers such as motives to drink and sensation-seeking are taken into consideration. Hierarchical multiple regression analyses were used to test both Objectives 2 and 3.
Method
Study Design
A prospective study design was used, with a 1 to 4 week lag-time between survey administrations, consistent with published test–retest assessments of alcohol-related measures (Gruenewald & Johnson, 2006; Hettema, Miller, Tonigan, & Delaney, 2008).
Participants
A total of 130 individuals participated in this study,
1
all students attending a large university in the west of Ireland. The sample was comprised of 106 females (81.5%) and 24 males (18.5%). Participants’ mean age was 20.56 (
Measures
Time 1 measures
Alcohol Quantity/Frequency (QF)
Participants were asked five questions about prior/current drinking behavior (Ramstedt & Hope, 2005): (a) usual amount of standard drink consumption (USDC; that is, average number of drinks per day of drinking; Rehm et al., 2003); (b) monthly alcohol consumption (MAC); (c) yearly alcohol consumption (YAC); (d) binge-drinking occasions in the previous month (BDM); and (e) binge-drinking occasions in the previous year (BDY).
Three of the items were used by Ramstedt and Hope (2005): (a) frequency (
A fourth, screening, question was, “
Drinking Motives Questionnaire–Revised (DMQ-R)
This 20-item scale measures motives to drink alcohol across four factors (i.e., social, coping, enhancement, and conformity). It uses a 6-point Likert-type scale (1 =
RANDS
This 11-item scale (e.g., I would hate to be a non-drinker) uses a 5-point Likert-type response format (1 =
Time 2 measures
QF
See description under Time 1 measures (e.g., Ramstedt & Hope, 2005).
Alcohol-related problems
Eight items were used to assess this construct (e.g., During the past 12 months have you gotten into a fight when you had been drinking?) using a dichotomous Likert-type scale (1 =
Brief Sensation-Seeking Scale (BSSS)
This eight-item measure (e.g., I like to do frightening things) uses a 5-point Likert-type scale (1 =
RANDS
See description under Time 1 measures (e.g., Regan & Morrison, 2011).
Social-Desirability Scale (SDS-17)
This 16-item scale (Stöber, 2001) measures participants’ engagement in socially desirable responding (e.g., I always admit my mistakes openly and face the potential negative consequences). It uses a dichotomous response format (1 =
Statistical Analysis
Participant data were analyzed using the SPSS programme (Version 21). Descriptive statistics are presented, stratified by time of measurement, followed by reliability analyses of the RANDS (Cronbach’s alpha and the three indicants of test–retest: (a) a paired samples
Procedure
All respondents completed their questionnaires within a class setting. Prior to completing the questionnaire, individuals were told that participation was strictly voluntary; no self-identifying details were being gathered thereby safeguarding anonymity; and questions could be omitted at the discretion of the respondent.
Results
Descriptive Statistics
Time 1
Means, standard deviations, and alpha coefficients, for all Time 1 variables, are listed in Table 1. Scores were below the midpoint on the RANDS as well as the coping and conformity motive scales, indicating that respondents did not evidence high levels of these constructs. For the Enhancement and Social Motives subscales, scores were above the midpoint, suggesting that individuals reported, at least, moderate levels of drinking for enhancement and social reasons. The alpha coefficients for the RANDS and DMQ-R (all four subscales) were > .80, which denotes good scale score reliability (Carmines & Zeller, 1979).
Means, Standard Deviations, and Alpha Coefficients, for Key Variables.
Not all measures were assessed at both T1 and T2.
Time 2
Means, standard deviations, and alpha coefficients, for all Time 2 variables, are provided in Table 1. Scores were below the midpoint on the RANDS, the SDS-17, and the scale assessing alcohol-related problems. Thus, respondents (a) did not strongly endorse negative attitudes toward non-drinkers, (b) did not evidence social desirability bias, and (c) did not report experiencing problems stemming from alcohol use. The mean score on the indicator of sensation-seeking (BSSS) was slightly above the midpoint, which reflects modest levels of this construct among participants. As noted at Time 1, the alpha coefficient for the RANDS was > .80. For the SDS-17 and the BSSS, alpha coefficients were satisfactory: αs (in order) = .73 and .77, although the alpha coefficient for the Alcohol-Related Problems measure was subpar (.65).
Test–Retest Reliability Analyses of the RANDS
Using a paired samples
According to Landis and Koch (1977), the strength of test–retest agreement for ICC can be classified as follows: <.20 is poor; .21 to .40 shows fair agreement; .41 to .60 indicates moderate agreement; .61 to .80 denotes substantial agreement; and .81 to 1 indicates almost perfect agreement (also see Cicchetti, 1994). In the current study, all 11 items had single measure ICCs suggesting at least moderate agreement (ICCs ranged from .47 to .64). However, for the total RANDS’ score, the average measure ICC indicated a high level of agreement (.86, 95% CI = [.80, .90]; see Table 2).
RANDS’ Intraclass Correlation Coefficients (Indicating Level of Agreement Between Time 1 and Time 2): Individual Items, 95% CIs, and Scale Total.
The RANDS and Alcohol Consumption
Correlations were computed between scores on the RANDS, indicants of alcohol consumption, drinking motives, sensation-seeking, and social desirability bias. As expected, scores on the RANDS at Time 1 correlated significantly with all drink indicators (Times 1 and 2: all
Correlations Between RANDS and Indicants of Alcohol Consumption.
=
Multiple Regression Analysis
To reduce the number of regressions that were conducted, principal components analysis (PCA) was performed on the five drink indicants. The Kaiser-Meyer-Olkin measure of sampling adequacy, for Times 1 and 2 were .76 and .62, respectively, and Bartlett’s test of sphericity was statistically significant for both, suggesting the data were appropriate for PCA. Single component solutions were obtained (Time 1 eigenvalue = 3.48, 69.9% of the variance; Time 2 eigenvalue = 3.87, 77.35% of the variance). Based on the direction of the loadings, this component was labeled “risky drinking” (i.e., all drink indicants were higher, which, particularly for binge-drinking constitutes higher frequency of risky drinking occasions).
Multicollinearity, particularly among drinking motives subscales, was not problematic. 3 As well, for all regression analyses the Durbin-Watson statistic approximated 2, suggesting that autocorrelations among residuals were not of concern, and maximal values for Cook’s distance were less than 1 suggesting the absence of outliers.
To investigate whether the RANDS accounted for incremental variance in the component score of “risky drinking” at Time 1, a hierarchical regression was conducted. Step 1 involved the drinking motives (enhancement, social, conformity, and coping), and Step 2 involved the RANDS. Step 1 was statistically significant,
Another hierarchical regression was conducted for the Time 2 measures. Specifically, Step 1 involved sensation-seeking and Step 2 involved the RANDS. Step 1 was statistically significant,
Predictive Utility of the RANDS
A regression analysis was conducted to assess the predictive utility of measures taken at Time 1 in relation to last 30-day binge-drinking at Time 2. While in the previous regression analyses the component titled “risky drinking” was the criterion variable, as the two administrations were ≤ 30 days apart, in this analysis only “recent binge-drinking” was assessed as a proxy of risky drinking behavior. Scores on the RANDS at Time 1 were significantly correlated with binge-drinking at Time 2 (
Step 1 involved the drinking motives which were significantly correlated with binge-drinking (enhancement and social), and Step 2 involved the RANDS. Step 1 was statistically significant,
Discussion
Given that the RANDS is a relatively new measure of drink-related attitudes, there are numerous gaps in understanding with respect to the instrument’s psychometric properties. In the current study, the test–retest reliability of the RANDS was investigated and the results were promising. The overall ICC was substantial (.86), and the scale score reliability of the RANDS, across two testing sessions, was strong; a finding congruent with results provided earlier by Regan and Morrison (2011, 2013). Evidence of the RANDS’ equivalence between testing sessions is a useful addition to elucidating the scale’s psychometric characteristics.
The RANDS was also significantly related to all drink measures, and in regression analyses was more strongly associated with problem drinking than commonly assessed measures such as motives to drink and sensation-seeking. This confirms findings from previous studies utilizing the RANDS and adds to the growing evidence-base (Regan & Morrison, 2011, 2013, 2016) that a focus on attitudes toward non-drinkers may have a significant role to play in terms of alcohol consumption.
Of particular note is that the current study provides new data in relation to the RANDS’ predictive validity, with results suggesting that attitudes toward non-drinkers—more so than traditionally assessed motives for alcohol consumption—significantly predicted recent binge-drinking. The RANDS, and the broader concept of “the non-drinker” (e.g., Conroy, Sparks, & de Visser, 2015) may therefore have utility via the attenuation of risky drinking (Dzialdowski, Heather, & Crawford, 1988). For example, findings from a recent intervention study, which examined mental exercises focused on episodic
Limitations
Several limitations warrant mention. First, a relatively small number of participants (
Conclusion
This study suggests that the RANDS possesses good test–retest reliability, as measured by mean score comparisons, Pearson correlations, and ICCs. Importantly, the RANDS appears to have potential as a predictive tool for risky drinking. Further examination of gender, age, and cross-cultural invariance could be important as a way to enhance and widen the potential utility of this measure in alcohol research conducted in Ireland and internationally.
Footnotes
Declaration of Conflicting Interests
The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
Funding
The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: While the author(s) received no specific financial support for the research and/or authorship of this article, the senior author’s doctoral research, of which this study was a component, was funded in part by a Lady Gregory Fellowship, from the College of Arts, Social Sciences, & Celtic Studies at the National University of Ireland, Galway.
