Continuous feedback to promote self-management of rest breaks during computer use

Abstract Short rest breaks at regular intervals can reduce musculoskeletal discomfort and the risk of repetitive strain injury during intensive computer work, but may seriously disrupt some tasks. As an alternative, two laboratory experiments tested if application of ergonomic principles of feedback control could improve worker self-management of discretionary rest breaks. Undergraduate typists ( N = 31, N = 30) entered lines of randomized words for about 1 h. Typists received scheduled breaks unless their discretionary breaks reached a target level of 30 s every 10 min. Typists in treatment conditions received continuous feedback indicating how their discretionary breaks compared to the target level, but typists in control conditions did not. Feedback in one experiment was task-integrated to reduce distractions. Typists in the feedback conditions controlled discretionary breaks better than controls, and also responded favorably to the continuous feedback. Typists receiving task-integrated feedback reported less task disruption and back discomfort than controls. Mood and cardiac response were unaffected in both studies, but error rates were lower in the feedback condition of one experiment. These results indicate that computer users can utilize continuous feedback about rest break behavior to improve self management of discretionary rest breaks, with no untoward effects on performance, well-being, or user acceptance.

[1]  L J Fine,et al.  Musculoskeletal disorders among visual display terminal users in a telecommunications company. , 1994, Ergonomics.

[2]  Robert Henning,et al.  Compensatory rest breaks for VDT operators , 1994 .

[3]  J B Carter,et al.  Musculoskeletal problems in VDT work: a review. , 1994, Ergonomics.

[4]  G Salvendy,et al.  Microbreak length, performance, and stress in a data entry task. , 1989, Ergonomics.

[5]  Cary L. Cooper,et al.  Job control and worker health , 1989 .

[6]  Karl U. Smith,et al.  Performance of hybrid automated systems—a social cybernetic analysis , 1995 .

[7]  D L Fisher,et al.  Repetitive Motion Disorders: The Design of Optimal Rate-Rest Profiles , 1993, Human factors.

[8]  A Mital,et al.  The effect of different work-rest schedules on fatigue and performance of a simulated directory assistance operator's task. , 1994, Ergonomics.

[9]  Lawrence M. Schleifer,et al.  International Journal of Human-Computer Interaction , 2009 .

[10]  M. Hagberg,et al.  The effects of different pause types on neck and shoulder EMG activity during VDU work. , 1989, Ergonomics.

[11]  Wt Singleton,et al.  Measurement of Man at Work , 1971 .

[12]  O. G. Okogbaa,et al.  System response time and method of pay: cardiovascular stress effects in computer-based tasks. , 1990, Ergonomics.

[13]  W Karwowski,et al.  The effects of computer interface design on human postural dynamics. , 1994, Ergonomics.

[14]  Gavriel Salvendy,et al.  Handbook of human factors. , 1987 .

[15]  E. N. Corlett,et al.  Machine pacing and occupational stress: G. Salvendy and M.J. Smith (Eds) Taylor and Francis Ltd, pp 384, £19.75 , 1982 .

[16]  Pascale Carayon,et al.  Effect of Electronic Performance Monitoring on Job Design and Worker Stress: Review of the Literature and Conceptual Model , 1993 .

[17]  W Rohmert,et al.  Problems of determination of rest allowances Part 2: determining rest allowances in different human tasks. , 1973, Applied ergonomics.