Awasthy, S., Defence Institute Of Psychological Research, Defence R& Organization, India
The aim of the study was to identify the qualities deemed essential for the efficient performance of ATC duties and to develop suitable measures to assess them. After surveying the relevant literature and conducting job analysis, a battery of seven tests, namely : (i) Verbal Intelligence Test (VIT), (ii) Non- verbal Intelligence Test (NVIT), (iii) Language Usage Test (LUT), (iv) Space Visualization Test (SVT), (v) Digit Symbol Test (DST), (vi) Attention Allocation Test (AAT), (vii) Speed & Accuracy Test (SAT) were developed/selected to assess the qualities/ attributes deemed essential for successful performance on the job. The tests were administered for preliminary try- out on 108 candidates who appeared for selection to commissioned ranks in the Indian Armed Forces. Item analysis of the tests were carried out and items having a difficulty level of .35 to .65 and discriminative index beyond .20 were finally retained in the test battery. The final forms of the following tests, (i) Intelligence, (ii) Language Usage, (iii) Space Visualization, (iv) Digit Symbol, (v) Attention Allocation and (vi) Speed & Accuracy were administered to 100 ATC trainees who were on the verge of completing their training. Timing of the tests were fixed to yield the normal distributions of test scores and maximum reliabilities. Validity co- efficients were computed by studying the relationship between test scores and the training marks as the external criterion. The correlation co-efficients ranged from .23 to .69. The Wherry Doolittle test selection method was used to select the most efficient battery of the tests. Multiple correlation was found to be maximum for three tests namely, Intelligence Test, Speed & Accuracy Test and Digit Symbol Test. Thus, these three tests have been recommended for use for the selection of Air Traffic Control officers.