The effect of latency variables on repeated measures inference applied to the measurement of risk-taking as a function of psychopathy

In numerous psychology studies, subjects are asked to perform some task a number of times, T. The effect of the choice of T on the associated inference, however, is usually not assessed. We investigate the appropriate choice of T empirically by using data collected in a study on the relationship between psychopathy and risk-taking in 90 inner city drug users enrolled in a residential treatment program. We show that, when studying this relationship, the latency variable usually discarded from the analysis behaves exponentially allowing a natural division of the study period 1, . . . , T into two distinct subperiods. These subperiods yield significantly different results—in the early period only (which we call “reactive”), subjects with high psychopathy scores exhibit lower sensitivity to reward and punishment in our risk taking experiment. The later period (which we call “stable”) shows no relationship between sensitivity to reward and punishment and psychopathic tendencies.     

Many-valued Logic in Multistate and Vague Stochastic Systems

The state of the art in coherent structure theory is driven by two assertions, both of which are limiting: (1) all units of a system can exist in one of two states, failed or functioning; and (2) at any point in time, each unit can exist in only one of the above states. In actuality, units can exist in more than two states, and it is possible that a unit can simultaneously exist in more than one state. This latter feature is a consequence of the view that it may not be possible to precisely define the subsets of a set of states; such subsets are called vague . The first limitation has been addressed via work labeled 'multistate systems'; however, this work has not capitalized on the mathematics of many-valued propositions in logic. Here, we invoke its truth tables to define the structure function of multistate systems and then harness our results in the context of vagueness. A key contribution of this paper is to argue that many-valued logic is a common platform for studying both multistate and vague systems but, to do so, it is necessary to lean on several principles of statistical inference.     

Accounting and budgeting systems: The issue of congruency

The importance of designing an accounting system that is congruent with an organization's budgeting system has been noted in the literature. Unfortunately, in many government organization it is common to find incompatible budgeting and accounting systems. The purpose of this study is to investigate whether gearing the accounting information system to a zero-base budgeting system increases the perceived usefulness of the budgeting process. This issue is examined under conditions of both scare and abundant resources. Based on an empirical study, it is shown that the usefulness of a budgeting system to budget recipients may indeed be dependent on the accounting information system, conditioned on the availability of resources. Given the relationship between budgeting and public policy, implications of the study for the public policy making process are discussed.