Lab Assignment #2: Are You Lonely Tonight? Reyanna Myls Rebucas, 3139056 Department of Psychology, University of Winnipeg PSYC 2101L: Introduction to Research Methods Instructor: Jen Chuchmuch January 30, 2023 2 1. Use SPSS to compute the coefficient alpha (α) for the revised UCLA Loneliness Scale and for the University of Winnipeg Loneliness Scale. See the SPSS directions below. Have the coefficient alphas on a single page of output. Circle and clearly label the coefficient alpha (α) for each scale. Reliability - UCLA Case Processing Summary N Cases Valid Excludeda Total % 31 100.0 0 .0 31 100.0 a. Listwise deletion based on all variables in the procedure. Reliability Statistics Cronbach's Alpha N of Items .906 20 Reliability - U of W Case Processing Summary N Cases Valid Excludeda Total % 31 100.0 0 .0 31 100.0 a. Listwise deletion based on all variables in the procedure. Reliability Statistics Cronbach's Alpha N of Items .840 20 3 2. What is coefficient alpha (α) for the revised UCLA Loneliness Scale? What is coefficient alpha (α) for the U of W Loneliness Scale? The coefficient alpha (a) for the revised UCLA loneliness Scale is 0.906. The coefficient alpha (a) for the revised U of W Loneliness Scale is 0.840 3. Most investigators would be satisfied with an alpha of 0.7 or higher for an estimate of internal-consistency reliability. Does the U of W Loneliness Scale pass this criterion? How about the revised UCLA Loneliness Scale? According to the 0.7 or above criterion, both the U of W and UCLA Loneliness Scale alphas would pass. Since the U of W Loneliness Scale alpha is 0.840 and the UCLA Loneliness Scale alpha is 0.906, they both pass the 0.7 or higher criterion for internal-consistency reliability. 4. Which scale has the higher reliability estimate? If one scale has a higher alpha than the other, is it necessarily a better measure of the loneliness construct? The scale with the higher reliability estimate is the UCLA Loneliness Scale. Reliability refers to consistency between results under similar conditions, and even though the UCLA has a higher reliability estimate, it technically can’t be better. Since the U of W and the UCLA scale results were measured under two very different conditions and have different scale questions, we can’t compare the two in terms of reliability. 4 5. Complete Table 2.1 (i.e., fill in the four missing values) … Compute coefficient alpha by hand for the measurement instrument represented in Table 2.1.