Suchergebnisse

A novel approach to selection/classification is described. The approach which combines the learning, performance test, and assessment center contexts has been verified in a variety of situations. There is reason to believe that the approach: (1) yields selection/classification devices which possess reliability, validity, and appropriate power, and (2) meets fairness criteria.

A person is assumed to have varying levels of confidence that a defect or a target exists. He will say that a defect or target exists when his confidence (x) is equal to or exceeds a criterion level (c). For a single criterion level, he will say that no target or defect exists when his confidence is below c. For a double criterion level, he will say "no" when his confidence is below a lower value than c. Otherwise, he will try again. When a defect exists, the confidence frequency function (f1) increases with increasing confidence. When no defect is present, a different (decreasing) function (fo) describes the behavior. Confidence (x) varies between 0 and 1. For a given frequency function, reliability (R) is calculated as a function of the relative number of defects (r) and the criterion level. The optimum criterion level and maximum reliability (Rm) are found. Operating characteristic (OC) curves are presented. For a single criterion level, results are given for the following types of frequency functions: linear, exponential, normal, step, and arbitrary. Discrete distributions are also considered. An example for a double criterion level is also presented.

A computer based method for digitally simulating the performance, in one-operator systems, of operators who possess various characteristics is described. The method is believed applicable for evaluating various system designs while the system is in the early design stage. Two operational tasks, landing an F4D aircraft on a carrier and firing an air-to-air missile, were simulated using the method. The predictions from the model were compared with outside criterion data for the same tasks. The predictions are held to conform generally with reality and to be reasonable. The results of the two applications of the model were in general agreement. It is held that the model may be considered sound and may now be tentatively employed for comparative evaluation of alternative system designs or for predicting system performance.

A display evaluative tool called the "Analytic Profile System" (APS) was developed and tested. The scorable factors included in the APS are based on the results of a multidimensional scaling of the display-observer interface. The technique itself rests on forced-choice methods and is held to possess acceptable psychometric characteristics.

This paper describes and gives the basis for a Display Evaluative Index (DEI) technique, a calculational method for deriving a figure of merit of the effectiveness of displays of a particular equipment to transfer information to the operator and for the operator to act on that information and perform the appropriate control action. Reliability, validity, and discriminating power results are reported to be satisfactory.

Control activation time as a junction of control number, control density, activation sequence, control complexity, and link multiplicity was investigated. Although activation time was found to be significantly related to each factor, the number, density, and link multiplicity factors were considered to exert the greatest operational significance.

"Contract N61339-66-C-0045." ; Cover title. ; Bibliography: p. 79. ; Mode of access: Internet.

Cover title. ; "Contract no. N61339-1537." ; Bibliography: p. 49. ; Mode of access: Internet.

"Draft field manual, draft FM 26-2." ; Mode of access: Internet.