62 experienced inspectors inspected 10 different items of electronic equipment covering a wide range of complexity. 8 or more inspectors inspected each item. Inspection performance was found to have an almost perfect inverse relationship with equipment complexity, r' between percentage of defects detected and pair comparison ratings of complexity was -92; r' between percentage of defects detected and number of parts was -91 The results indicated that equipment complexity has a significant detrimental effect on inspection performance and that this effect cannot be overcome by extending the amount of inspection time allotted

We describe the principles and practice of computer-assisted telephone interviewing, and its successful deployment in a general practice-based research study into the referral behaviour of general practitioners (GPs) in the Grampian region of Scotland. Participating GPs were interviewed concerning the acceptability of the method. It proved to be an efficient and acceptable method for collecting data from a large number of practitioners in this large geographical area. Our experience confirms that this efficient method of data collection could be much more widely utilized in primary care research.

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