It seems proper in the first instance to admit frankly that the following pages are of a somewhat hybrid character. They do not constitute an official document prepared in accordance with Service orders and in the type of language which would normally be used in Service channels; in any case the vast bulk of the matter contained herein is officially recorded in some form or other in the files of the R.A.A.F. Nor does this work pretend to be in any sense a text book on applied psychology and mental testing, though the writer has allowed himself here and there to express his own theoretical views on a variety of matters associated with testing.
Nevertheless, it is considered that the large body of experience obtained during the five years in which R.A.A.F. testing was in progress should be published in some form, firstly, for purely historical purposes, and secondly - a much more important reason - for the information of psychological workers of the past war period. Partly because of their confidential nature, and partly to conserve space, the aptitude tests themselves are not reprinted here in extenso. Sutf1c1ent examples are given, however, to indicate more or less precisely the nature of each. Responsible persons are not likely to experience difficulty in obtaining full copies on application to the appropriate R.A.A.F. authority.
It is not possible to acknowledge all of tho help which has been accorded during the past five years by those directly and indirectly associated with the work. The writer would, however, especially mention a few names intimately associated with the developmental and administrative side. His personal thanks and appreciation are tendered to Group Captain H. C. Sheath, as a result of whose initiative, the whole work may largely be said to have been inaugurated. The acknowledgement to Group Captain H.C. Sheath is not only a personal one, but is also made on behalf of the numerous Education officers whose co-operation has been appreciated. To Wing Commander J. F. Clark, in charge of the Directorate of Training Research Section, thanks are also due, for supporting and encouraging the development or aptitude testing during the later stages of the war; also to other officers of the Directorate of Training whose assistance has been forthcoming from time to time. Amongst his own Headquarters staff, the writer would like to express his thanks to Under Officer G. E. Adams, W.A.A.A.F. who was the first assistant allotted to him in l94l and who has served with the Section for 4 years; to Warrant Officer A.C. Humphreys, R.A.A.F. whose efforts during the early period did much to promote the success of the work; to Flight Sergeant B. J. Brown and Sergeant J. E. Tait, W.A.A.F. who have been continuously associated with the research side and without whose meticulously kept Records the compilation of this work would not have been possible; to Corporal B. N. Vernon, W.A.A.F. whose unusual range or general knowledge has been of great value in compiling test items; and to Sergeant J, H. Kennedy, R.A.A.F, who has served conscientiously and effectively with the Section since optical trouble necessitated his withdrawal from aircrew training in 1942. Thanks are also due to Miss L. J. Martin, B.A., and Mr. R. w. Orkney, B.A., each or whom was a member of the section for a considerable time.