Table 2 Factor analysis and reliability data of HEADWORK questionnaire (N = 373)
Loadings | Item Mean ± SD | Item-Total Correlation | Alpha if item excluded | |
|---|---|---|---|---|
Section A: Work-related difficulties KMO= .938; BTS, P<.001; Eigenvalue: 7.377 (67.1% of variance) Alpha= .950; Inter-item R= .636; Average Item-total R= .775 Chi2= 131.2; d.f.= 44; Chi2/d.f.= 2.98; RMSEA=0.047 | ||||
Paying attention to work tasks | .883 | 2.94 ± 0.97 | .851 | .942 |
Solving organizational problems at work | .876 | 2.96 ± 1.04 | .832 | .943 |
Starting a new work task | .865 | 2.87 ± 1.03 | .818 | .943 |
Dealing with work problems | .851 | 2.95 ± 0.96 | .830 | .943 |
Reading and writing | .822 | 2.90 ± 1.05 | .784 | .945 |
Using the PC | .795 | 3.13 ± 0.98 | .753 | .946 |
Answering the phone | .765 | 2.67 ± 1.01 | .754 | .946 |
Driving a car | .762 | 2.81 ± 1.13 | .745 | .946 |
Moving from one place to another | .760 | 2.75 ± 1.07 | .741 | .946 |
Talking and interacting with other people | .756 | 2.86 ± 0.88 | .743 | .946 |
Understanding what is said | .684 | 2.46 ± 0.99 | .677 | .949 |
Section B: Factors contributing to work difficulties KMO = .830; BTS, P < .001; Eigenvalue: 3.127 (52.1% of variance) Alpha = .808; Inter-item R = .412; Average Item-total R = .570 Chi2 = 20.1; d.f. = 9; Chi2/d.f. = 2.23; RMSEA = 0.050 | ||||
Noise in the workplace | .840 | 2.94 ± 1.06 | .715 | .744 |
Smell in the workplace | .767 | 2.58 ± 1.20 | .627 | .762 |
Brightness of workplace | .765 | 2.75 ± 1.07 | .676 | .752 |
Extended working hours | .652 | 2.72 ± 1.10 | .579 | .774 |
Negative attitudes of colleagues | .428 | 2.17 ± 1.04 | .424 | .806 |
Air conditioning | .419 | 2.19 ± 1.15 | .400 | .809 |