A suitable tool was designed and manufactured. This was demonstrated to HR staff and a trial was carried out in the factory with existing product builders. 25 people took part in the trial. Administration time per group was under 30 minutes. No particular issues were raised by candidates. Several supervisors viewed the process and seemed to be satisfied by the likely utility and job relevance of the test. The triallists repeated the test and figures for the second testing were similar, with slight improvements in some cases, to the first trial figures. This suggests that a practice effect will not be a major issue in operational use. Scores ranged from 11 to 36 giving a good spread. The distribution of scores was approaching normal with a slight tail to the high end. This exemplifies a typical skill pattern. The bulk of the population occupy the middle ground of values, followed by a lesser number of exceptional people at the upper end.
Implications for Selection
We have to examine the results in comparison to the job performance of specific individuals. The main question being, do the results reflect the dexterity of the candidates as experienced in their field performance? Assuming that they do and taking into account that the majority of the trial candidates have already passed a crude screening test and are working as product builders, we could set the following cut off points for placement as guidelines in the initial phase of the tool use.
Below 10 Unacceptable
11-15 Possible re-test or examine work history
16-25 Satisfactory Dexterity
26 and above Highly Dexterous
Conclusions and Progression
The trial results seem to be satisfactory from the psychologist’s perspective. Feedback is now necessary from the factory representatives. If all goes well we should proceed to use the instrument for a trial period in an actual selection situation. We will collect more data from industrial or engineering apprentices in a college or training centre. A test manual will be written with full instruction and interpretive guidelines. Persons using the instrument will need a brief training course in the practical use of the test.