Document 71dybNbEpj4Vd96R6yJaDXMxE

Human Factors Engineering POPULATION STEREOTYPES-BEHAVIORAL RESPONSES CONTROL MOVEMENT UP aUP 8 RECOMJMENDED SYSTEM (OR EQUIPMENT COMPONENT) RESPONSE DIRECTIONAL NONDIRECTIONAL RIGHT NOT RECOMMENDED FORWARD iti RECOMMENDED CLOCKWISE NOT RECOMMENDS) INCREASE* %Jlk RECOMMENDED NOT RECOMMENDED NOT RECOMMENDED RIGHT % FORWARD faff RECOMMENDED RECOMMENDED RECOMMENDED NOT RECOMMENDB3 nib RECOMMENDED NOT RECOMMENDS) - * . (XOCKWISE NOT RECOMMENDS) NOT RECOMMENDED j RECOMMENDED * Increase refers to increase in power output, brightness, rpm, etc, and to "on" or "start" as opposed to "off" or "stop" RECOMMENDS) RECOMMENDED RECOMMENDS! iMl RECOMMENDED FlG 5-13 --General population stereotype control expectancy When the control is moved as shown at left, most people expect a response as shown at right Additional stereotypes are shown in table on facing page Adapted from C T Morgan, et al Human Engineering Cuide to Equipment De&ign New }ork N} , McGraw-Hill Book Co 1963 Function 2Man as Information Processor Much research is presently being performed to learn more about man as an information processor At best, the most that can be said here is limited to the introduction of an idea or two (See the Attneave and McCormick citations in "References ") Human judgements may be classified as either relative or absolute A relative judge ment is one that is made when an opportunity to compare two or more objects presents itself An absolute judgement is made in the ab sence of any standard or comparison It has been estimated that most people can differ entiate as many as 10,000 to 300,000 different colors on a relative basis--but only 11 to 15 on an absolute basis See Fig 5-12 As a general rule, therefore, a system should have 114