VIDEOLOGGER: A computerized multichannel event recorder for analyzing videotapes

A microcomputer-assisted system that permits multiple events to be coded from videotape to a common time base is described. The system allows an operator, by pressing a button, to record the onset and offset times of any number of events. It requires a video recorder, an Apple II microcomputer, a John Bell 6522 timing card, and a pair of switches. The software package consists of five programs: one to make timing signals on the videotape, one to record the onset time and duration of the operator’s buttonpresses, one to read and print the coding data from disk, one to operate the timer, and one to process the compiled code used in the software package. All necessary wiring diagrams are shown. Software is available gratis from the authors on request.     

A microcomputer interface for control of real-time experiments in cognitive psychology

A microcomputer system for real-time control of experiments in cognitive psychology is described. The microcomputer serves as an interface that allows a remote timesharing computer to control the timed display of textual material on CRTs and collect response times accurate to 1 msec. It can control two CRT subject stations presenting the same or different experiments and control other devices such as slide projectors and tape recorders. It is argued that such special-purpose microcomputer interfaces provide a real-time laboratory with significantly less effort than does the more traditional laboratory minicomputer.     

A low-cost high-speed digital data acquisition and display system

A flexible and inexpensive data acquisition and display system based upon the KIM-1 microcomputer module is described. A simple signal-conditioning circuit and program are shown that will allow events to be counted at rates to 1,000/sec and stored in successive time bins. The program counts events from each of two event detectors and stores the count of each detector in an independent set of time bins. Up to 127 16-bit bins are available to each event detector and bin width can be varied from 1 msec to 1 min. A separate input can be used to time-lock data collection to a specific stimulus allowing poststimulus histograms or IRTs to be collected. The collected data can be sequentially displayed as a decimal number on a built-in LED display and stored for later analysis on an inexpensive audio cassette recorder.     

The Microcomputer as Perceptual Tool:

The microcomputer as a medium of instruction is not inherently better or worse than any other medium be it lecture, television, print or practical experience. However, the microcomputer can simultaneously present instruction and collect data on student performance. In order for educators to evaluate the success of instruction presented by computer they must use the microcomputer as a perceptual tool to more sensitively monitor and modify the educational process. Thoughtful consideration of monitoring data by special educators promises to make the microcomputer a revolutionary aspect of school instruction. Such an educational revolution can extend to the delivery of special services provided that the time and ancillary supports needed to utilize performance are made available to school personnel.     

A microcomputer interface for applications requiring large numbers of subjects

While most small microcomputers are powerful enough to control intricate experiments, a major limitation of many is their limited I/O capability. An interface for the KIM-1 or similar small microcomputer is described that provides for up to 128 or more inputs. The basic components of the interface are a series of shift registers through which the incoming data are manipulated and read by the microcomputer. Provisions are also made to latch the incoming data, allowing detection of very high rates of or even simultaneous data input. The interface is modular in design and can be expanded by increments of eight inputs. Use of the system to monitor a large number of running wheels is discussed.     

Limitations of high-level microcomputer languages in software designed for psychological experimentation

The execution times of microcomputer high-level-language commands can be long enough to be of concern in experiments in which precise timing is a consideration. The problems in developing standard BASIC timing routines are addressed. A technique for using the Model III TRS-80 real-time clock to calibrate BASIC timinig routines is described, and representative execution times of selected commands are reported. It is concluded that high-level languages are too slow and that execution times are too variable for critical timing in experiments. On the other hand, machine language programs can provide the needed precision and control.     

A microcomputer system for controlling classical conditioning experiments

A microcomputer-based laboratory system for controlling stimulus presentations and data acquisition in classical conditioning experiments is described. The system comprises an Intel 386/486-based microcomputer and a commercially obtained low-cost counter/timer board with input/output lines for stimulus timing and external device control. A simple, yet versatile custom-designed structured programming language is provided for performing an unlimited number of stimulus configurations and their sequences. In electrophysiological studies, the system can be flexibly connected to computer-controlled signal conditioning systems for the amplification and filtering of multiunit and evoked field potential responses and to high-speed data acquisition systems for sampling and analyzing the responses. The costs of reserving an entire microcomputer for experiment control are well compensated for by the simplicity and efficiency of programming and transportability of the control protocols between different setups and laboratories. Furthermore, a data acquisition and analysis system most suitable for the aims of a research project can be selected.     

Low-cost microcomputer networking: How to get high throughput on a low budget

A very low-cost, high-throughput laboratory data acquisition and experiment control system may be configured by using a star network architecture with a low-cost microcomputer as network controller and one or more microprocessor-based single-board controllers as satellites. A network of this type, using Apple II microcomputer ($1,500 with 48K RAM and one minidiskette drive) as main node and up to seven KIM-1 microcontrollers ($159 each) as satellites is described, and its development is discussed in detail.     

MICROCOMPUTER USAGE AS AN OPPORTUNITY: THE INFLUENCE OF CONTEXT IN EMPLOYEE TRAINING

This study presents a test of the influence of social context on training outcomes. Specifically, the effects of labeling microcomputer usage as an opportunity were examined on computer anxiety, computer efficacy beliefs, and learning. Nonacademic university employees enrolled in an introductory microcomputer training class were assigned to a session in which microcomputer usage was randomly established as an opportunity or neutral. Two studies were conducted. Study 1 ( N = 84) identified the issue characteristics of opportunities and threats as a basis to establish context. Study 2 (N = 79) reported the results of the training. Results indicated that, after controlling for pretraining expectations about microcomputer usage, trainees in the opportunity condition exhibited higher computer efficacy and learning, as well as lower computer anxiety, than trainees in the neutral condition. These findings suggest that labeling the context can be a relatively powerful training intervention. Implications for practice and future research are discussed.     

WINDSORT: A fully automated technique for collecting sort data for multidimensional scaling analysis

WINDSORT is a microcomputer program that uses an automated sorting procedure to collect the preprocess proximity data commonly analyzed using multidimensional scaling. The traditional manual sorting task is less tedious, more enjoyable, and far easier for subjects to perform than the tasks that are used in alternative data-collection techniques. However, complete automation of the sorting task has not previously been fully successful WINDSORT uses a form of the hierarchical sorting technique which is reputed to yield richer data than single-sort techniques A maximum of 45 stimuli can be scaled using WINDSORT. Resulting output includes dissimilarity matrices which are ready to analyze using MDS.     

Accurate display timing using an enhanced BASIC for the Tandy Color Computer

The general suitability of the Tandy Color Computer as an inexpensive laboratory microcomputer is discussed. A program is described that adds several useful timing-related functions to the native BASIC in the Tandy Color Computer, thus allowing BASIC to be used for programming experiments involving tachistoscopic displays and reaction times.     

Social data analysis instruction and the MISSIS system

Social data analysis instruction is an enterprise providing experiences to develop problem solving skills. A proper focus upon analysis can best be provided with a data analysis package stressing simplicity rather than complexity. MISSIS is such a system, and it is designed to operate on small computers. Small technology can provide a training ground for making sound decisions in analyzing data.     

Microcomputer graphics in psychological research

This paper discusses a methodology for psychological instrumentation in which requirements common to a spectrum of experiments are defined and implemented in a microcomputer system. The microcomputer may either stand alone or be used as an intelligent front end to a larger computer. In either case, experiments are described in a high-level implementation language. The advantages of this approach include reduced hardware and maintenance costs, increased reliability, and smoother operation by research personnel. A tutorial example is given of the design and construction of one such system used to present visual stimuli, including text, graphics, and simple animation, on a movable array of video monitors. Displays are produced by a Z80 microcomputer in response to commands from a larger host computer, in this case a PDP Lab/8e. Illustrations are given of three studies in progress; comparisons are made with special-purpose equipment built earlier. The microcomputer system is preferable from both a cost and management point of view.     

Independent operation of implicit working memory under cognitive load

Implicit working memory (WM) has been known to operate non-consciously and unintentionally. The current study investigated whether implicit WM is a discrete mechanism from explicit WM in terms of cognitive resource. To induce cognitive resource competition, we used a conjunction search task (Experiment 1) and imposed spatial WM load (Experiment 2a and 2b). Each trial was composed of a set of five consecutive search displays. The location of the first four displays appeared as per pre-determined patterns, but the fifth display could follow the same pattern or not. If implicit WM can extract the moving pattern of stimuli, response times for the fifth target would be faster when it followed the pattern compared to when it did not. Our results showed implicit WM can operate when participants are searching for the conjunction target and even while maintaining spatial WM information. These results suggest that implicit WM is independent from explicit spatial WM.     

Simulation of complex survival distributions

This paper describes a method for generating sample survival distributions from a hypothetical population, as would be required for running Monte Carlo simulations. The method is based on the concept of a quincunx. Cases are entered into a life table and allowed to drop out or die during each interval with probabilities that mirror the hypothetical population. By repeating this process many times and tracking the results, the researcher is able to study the sampling distribution of effect size indices and test statistics, and can generate empirical estimates of power and precision for planned studies. Unlike other methods that are commonly used for this purpose, the model proposed here allows the researcher to define a population in which the hazard rates and/or attrition rates vary substantially from one time point to the next, as may be the case in clinical trials or studies of processing times. The method requires less than 100 lines of code and runs some 10,000 simulations per hour on a microcomputer.     

Issues with the SIMPLE model: comment on Brown, Neath, and Chater (2007)

SIMPLE (G. D. A. Brown, I. Neath, & N. Chater, 2007) attempts to explain data from serial recall and free recall in the same theoretical framework. While it can fit the free-recall serial-position curves that are the cornerstone of the 2-store buffer model, it does not address 2 classic issues in short-term memory research: similarity effects and presentation-rate effects. Similarity effects in free recall led to important work on organization in free recall, whereas similarity effects in serial recall led to the phonological basis of short-term memory. Presentation-rate effects operate quite differently in free and serial recall. The model also does not consider recall order effects or interresponse times in free recall, which may be problematic.     

An evaluation of statistical software for research and instruction

A variety of microcomputer statistics packages were evaluated. The packages were compared on a number of dimensions, including error handling, documentation, statistical capability, and accuracy. Results indicated that there are some very good packages available both for instruction and for analyzing research data. In general, the microcomputer packages were easier to learn and to use than were mainframe packages. Furthermore, output of mainframe packages was found to be less accurate than output of some of the microcomputer packages.     

Training Special Education Personnel for Effective Use of Microcomputer Technology:

Special educators have been quick to embrace microcomputer instruction; both special education and microcomputer instruction share the promise of developing individualized instructional programs matched to student needs. From this viewpoint, microcomputers have the potential for operationally defining what is "special" about education. Despite this promise, however, there is a limited data base from which to make empirical decision on effective microcomputer use in the classroom and on teacher training needs. A model for assessing teacher training needs is discussed in which microcomputer skills are viewed within the context of other teacher-effectiveness variables. A two-tiered appeaoch to teacher training in microcomputer instruction is developed, based on the promise of microcomputer instruction and upon pragmatic classroom considerations.     

Double response to Stroop stimuli.

To reexamine Klein's 1964 findings we carried out two experiments on the double response made to Stroop stimuli. In Exp. 1 incongruent color-word stimuli were presented on a CRT online with a microcomputer. A color-word card was used in Exp. 2. Subjects were asked to read words before naming colors or, conversely, to name colors before reading words. An analysis of variance (the task x the type of task) was performed on response times in both experiments. Two main effects and interactions were nonsignificant. Some subjects made an error-like reverse-order response on the double-response task. The present findings do not support Klein's findings or the competition explanation of the Stroop effect.     

A microcomputer-based plotter system for the TRS-80 and HP 7225

A software package, MICROPLOT, was developed to run on a TRS-80 Model I microcomputer in conjunction with the Hewlett-Packard (HP) 7226 or similiar HP plotter. Capabilities include XY plotting of up to 10 data sets and curve plotting of an nth-degree polynomial. The package operates under the NEWDOS 80 Version 2.0 disk operating system but, with appropriate modification, can be run under any operating system that has dynamic program line merge and delete functions in BASIC. This report describes the structure of the system, hardware configuration, plotting capabilities, and applications in the behavioral laboratory.