In the first (N = 140) of two quasi-experimental field studies, trial group employees were changed from a 5/40 to a 4/40 work schedule for four months then returned to a 5/40 schedule. In a second study (N = 102), trial group employees were changed from 5/40 to flextime. Reactions were evaluated using a model for understanding the impact of work schedules. The effects of schedule changes matched those anticipated by pre-intervention surveys of employees. Factors related to organizational effectiveness were enhanced where specific organizational needs were met. Interference with personal activities was reduced where employees had experienced specific difficulties. The most powerful effect, however, was on worker attitudes toward specific work schedules. In addition, a mild positive (perhaps Hawthorne) effect was evident for a wide range of general worker reactions. The authors would like to thank Joel R. Levin of the University of Wisconsin-Madison for his very helpful input regarding the design of the statistical analysis reported in this paper. COPYRIGHT 0 1987 PERSONNEL PSYCHOLOGY, INC. 215 2. Does the introduction of an alternative work schedule (4/40 or flextime) influence the extent to which work interferes with the following personal activities of workers: (a) interactions with family and friends; (b) access to services, events, and consumables; and (c) the conduct of financial activities? It is predicted that movement from 5/40 to 4/40 or from 5/40 to flextime RANDALL B. DUNHAM ET AL. 217 INTERFERENCE WITH PERSONAL ACTIVITIES EMPLOYEE NEEDS AND PREFERENCES t GENERAL REACTIONS W SPECIFIC WORK SCHEDULE ATTITUDES EFFECTIVENESS / NEEDS AND --T ENVIRONMENT Figure 1: The Impact of Work Schedule Characteristicswill cause interference to decrease, while movement from 4/40 to 5/40 will cause interference to increase.'3. Does the introduction of an alternative work schedule (4/40 or flextime) influence worker satisfaction with the work schedule? It is predicted that movement from 5/40 to 4/40 or from 5/40 to flextime will cause satisfaction with the work schedule to increase, while movement from 4/40 to 5/40 will cause satisfaction to decrease.
4.Does the introduction of an alternative work schedule (4/40 or flextime) influence general worker reactions (e.g., overall satisfaction, job involvement, motivation, and stress reactions)? It is predicted that movement from 5/40 to 4/40 or from 5/40 to flextime will cause overall satisfaction, job involvement, and motivation to rise slightly and stress reactions to decrease slightly.'This prediction is quite straightforward for the flextime schedule if we assume that schedule will allow individual workers to alter their schedules to reduce interference. A 4/40 schedule could, however, produce mixed results. The extra day off should reduce some interference on a weekly basis, but the two extra hours of work per day could increase interference during these days.