Computer programming for generating visual stimuli

Critical to vision research is the generation of visual displays with precise control over stimulus metrics. Generating stimuli often requires adapting commercial software or developing specialized software for specific research applications. In order to facilitate this process, we give here an overview that allows nonexpert users to generate and customize stimuli for vision research. We first give a review of relevant hardware and software considerations, to allow the selection of display hardware, operating system, programming language, and graphics packages most appropriate for specific research applications. We then describe the framework of a generic computer program that can be adapted for use with a broad range of experimental applications. Stimuli are generated in the context of trial events, allowing the display of text messages, the monitoring of subject responses and reaction times, and the inclusion of contingency algorithms. This approach allows direct control and management of computer-generated visual stimuli while utilizing the full capabilities of modern hardware and software systems. The flowchart and source code for the stimulus-generating program may be downloaded from www.psychonomic.org/archive.     

Computer packages that contain the FFT

This paper critiques a set of software (i.e., SAS, BMDP, LSP) that contain a Fourier analysis program. In addition, this paper discusses both general-purpose software that runs a Fourier analysis and special Fourier analysis hardware. Some examples of the efficacy of commercially available software and hardware are given.     

IBM research in interactive data mining and scientific computing

A number of research and development efforts from IBM are described in the areas of data mining and visualization of large data sets. Some useful principles for data mining and visualization are discussed, and a few research programs and available products are described. In addition, the current IBM line of hardware and support software for scientific computing is briefly described.     

Sex Bias in Educational Software: The Effect of Designers' Stereotypes on the Software They Design1

Why is the computer more alluring to boys than it is to girls? One answer to this question is drawn from a social psychological model of human interaction. Social psychological research indicates that the expectations an individual has about another person can shape his or her interaction with that person. We hypothesized that, in a similar manner, the expectations software designers hold about the users of the software they design are central in determining the way the software they design interacts with the user. In order to test this notion, we had 43 educators with programming experience design software for either boys, girls, or students, and found that programs for girls were classifiable as “learning tools,” whereas programs for both boys and students were most like “games.” These differences occur as a function of the designers' expectations of the characteristics of potential users of the program and result in sex stereotyped software. We conclude that it is not the computer, or even the software, that is at the root of the sex bias in software, but the expectations and stereotypes of the designers of the software.     

Hardware and software evolution of an adaptive ability measurement system

A software system for the administration of six different strategies of adaptive ability tests in a variety of formats was developed both on a large-scale time-sharing system and on a real-time minicomputer system. Factors influencing both hardware selection and software design are discussed.     

Quintupling the speed of the PDP-8 DF32 disk system for real-time use

The author has noted some inefficiencies in the operation of the DF32 hardware/software disk system on the PDP-8. While such inefficiencies are not significant when the disk is used only as a store for programs which are called into core from the keyboard, they become important when the disk is used as a real-time backup for core. This paper isolates some of the problems, gives rules for avoiding them, and then describes how the system software was modified to obey these rules. The speed of the modified system is noticeable even when SAVEing and CALLing programs from the keyboard; successive blocks can be transferred between disk and core in one-fifth the previously required time.     

A multifunctional on-line brain stimulation system

A flexible on-line electrical brain stimulation system designed for brain stimulation reward (BSR) research is described. A Cromemco Z-2D microcomputer is interfaced with a constant-current stimulator and a standard operant chamber. The system programs, written substantially in BASIC, calculate BSR threshold by two rate-independent methods, measure rate of operant responding, and determine resistance of the brain. Other software programs are used for training rats on complex schedules of reinforcement, for system hardware calibration, and for sophisticated statistical data analyses.     

An intelligent experimental station controller for human experimental psychology

The purpose of this paper is to describe the intelligent experimental station controller used in the extensible multiprogramming system for experimental psychology (EMPP) at the University of Washington. The EMPP system is an integrated hardware and software system designed to simplify the development of on-line psychological experiments. An intelligent graphics control system is one of the most important aspects of the system. The controller oversees the operation of eight independent experimental stations, each containing a cathode ray tube (CRT) terminal and a keyboard console. In addition to conventional computer interface functions, the controller contains an extensible hardware character generator which allows dynamic selection of the display character set. This paper describes both the hardware and software features of the system.     

Computer control of memory experiments on a large-scale timesharing system

This paper describes a computer system for running verbal learning and memory experiments using a large-scale timesharing computer. Its application is illustrated by control programs used to set up, execute, and analyze a series of interactive free recall experiments. While limitations of timesharing systems for experimental control surely exist, they can often be removed by simple hardware or software. Further, a large machine can provide significant advantages in cost and software development over dedicated laboratory minicomputers. It is possible to obtain the advantages of both types of systems by introducing local intelligence to provide more precise timing and flexible control of experimental devices, while retaining the power and hardware and software resources of the large machine.     

An automated system for primate instruction for behavioral neurophysiology

This paper describes a flexible hardware/software system developed for use with a PDP-8I computer for conducting research in behavioral neurophysiology. A real time monitor was designed to facilitate development, debugging, and modification of programs to run experiments. It relieves the programmer of the burden of dealing with hardware dependent functions such as interrupt handling and input/output. In addition, it provides the user with a large library of callable routines to perform functions commonly needed for conducting experiments. The monitor is modular in design and could be expanded or modified for use with many configurations of the PDP-8 family of computers.     

An experiment control system for the Amiga microcomputer

The Commodore Amiga microcomputer, with its powerful and versatile hardware features, is well-suited to many areas of behavioral research. The complexity of the hardware and software, however, creates considerable difficulties for the researcher who wishes to construct real-time experiment-control programs. The present article describes a coordinated package of routines that have been designed to support experiment-control programs written in FORTRAN 77. The package was constructed specifically for cognitive research on verbal processes, but is sufficiently flexible to be useful in a variety of other applications. The functions performed by the program include the construction of stimulus displays, response detection, and timing operations.     

Junge ?Mehrfach- und Intensivt?ter“

Reoffending by young persons has led to the introduction of ??persistent offender programs?? in the police forces of most Federal states. In criminological research, too, multiple delinquencies are a phenomenon which receives a lot of attention. However, quite often there is still no connection between the criminological findings and the way these offenders are managed by the police. Therefore, it is the objective of this contribution to show the potential and the need for a closer interlinking of both areas. In this context, special emphasis is placed on the selection of persons to participate in programs for multiple and prolific offenders, in particular on the often used criterion of a negative prognosis on further delinquency. In principle, the inclusion of the findings of prognosis research promises a potential for optimization. However, police framework conditions need to be given special consideration in this connection. The necessity for interaction arises from the desire to use the limited resources of the police as efficiently as possible. On the other hand any police intervention influences the further course of the lives of young people so that the selection of the target group and the further police measures involve a great deal of responsibility.     

Random without replacement is not random: Caveat emptor

The vast majority of psychology labs rely on prepackaged software applications (e.g., E-Prime) for the programming of experiments. These programs are often used for stimulus selection, and many use a selection method referred to as random without replacement. We demonstrate how random without replacement deviates from random selection, and we detail selection biases that result. We also demonstrate, in a simple experiment, how these selection biases, if left unchecked, can influence behavior. Recommendations for reducing the impact of these biases on performance when random without replacement is used are discussed.     

On the Multilevel Nature of Meta-Analysis: A Tutorial,Comparison of Software Programs,and Discussion of Analytic Choices

The term “multilevel meta-analysis” is encountered not only in applied research studies, but in multilevel resources comparing traditional meta-analysis to multilevel meta-analysis. In this tutorial, we argue that the term “multilevel meta-analysis” is redundant since all meta-analysis can be formulated as a special kind of multilevel model. To clarify the multilevel nature of meta-analysis the four standard meta-analytic models are presented using multilevel equations and fit to an example data set using four software programs: two specific to meta-analysis (metafor in R and SPSS macros) and two specific to multilevel modeling (PROC MIXED in SAS and HLM). The same parameter estimates are obtained across programs underscoring that all meta-analyses are multilevel in nature. Despite the equivalent results, not all software programs are alike and differences are noted in the output provided and estimators available. This tutorial also recasts distinctions made in the literature between traditional and multilevel meta-analysis as differences between meta-analytic choices, not between meta-analytic models, and provides guidance to inform choices in estimators, significance tests, moderator analyses, and modeling sequence. The extent to which the software programs allow flexibility with respect to these decisions is noted, with metafor emerging as the most favorable program reviewed.     

MIDI and Macintosh: Searching for a better mousetrap

This paper will explore how MIDI (musical instrument digital interface)-technology can benefit researchers interested in using Apple Macintosh computers for stimulus control and response timing. One example presented here will illustrate how MIDI equipment can be adapted to provide millisecond precision response timing that cannot be obtained with solely software-based timing techniques. Another example will show how to use MIDI to control sound-generating devices that far surpass the sound-producing capabilities built into the Macintosh. There will also be a discussion of how certain MIDI equipment can provide information on the velocity and the duration of a response that is not available with traditional laboratory hardware. The examples presented here rely on a commercial software library called MIDIBASIC that was designed to be used with Microsoft QuickBasic. The availability of a millisecond timer that can be called from QuickBasic may offer a special advantage for researchers who have previously written programs in an Apple II environment using AppleSoft Basic.     

Problems with evaluation of courseware for instruction in psychology

Recent trends in courseware evaluation have stressed the importance of program characteristics ancillary to the learning process, such as the use of menus. Although attention to these aspects of programming may improve the appearance and ease of use of software, the primary consideration in the selection of instructional software is whether it can provide instructional content to the students who use it. This can best be determined by the instructor alone, who may often find it necessary to write programs to suit specific instructional needs. Such programs are in wide use and are often better than commercially available sets designed by professionals.     

Decision analysis: An approach for multidisciplinary teams in planning special service programs

A decision analytic approach for use by multidisciplinary teams (MDTs) in planning special service programs is described, and formative evaluation information on its application by MDTs in planning individualized education programs (IEPs) is presented. Decision analysis is applied following initial determination of program goals and objectives. In using the approach, an MDT engages in a six-step process: (a) delineation of program alternatives, (b) determination of program outcomes, (c) assessment of probabilities, (d) assessment of utilities, (e) determination of overall program values, and (f) selection of the program to be developed. Utilization of the approach allows a complex program planning situation to be disaggregated into its essential elements, with discussion of program alternatives occurring relative to specific decision criteria. Strengths and limitations of the approach also are discussed, and future directions for research are briefly noted.     

Integrating statistical software into laboratories and laboratory courses

Reasonable quality statistical software that is easy to use and easy to learn to use is available, and more will become available. This paper describes nine features of statistical software programs that make such programs easy to use. Some methods for evaluating the capability, accuracy, and speed of statistical software are discussed. In addition, some issues about university and software company support are considered. Finally, a technique for integrating software into laboratories is presented.