1978 DEC user group report

The 1978 meeting of users/owners of Digital Equipment Corporation (DEC) computer equipment is discussed.     

Macintosh statistical packages

Fifteen statistical packages for the Apple Macintosh computer are reviewed, and their features are listed and compared. Many do not follow the Macintosh user interface and are likely to be confusing to novices. Accuracy tests are reported for several programs.     

PC versus Macintosh users

In a sample of 78 university undergraduates, Macintosh users spent less time online than PC users and had more anxiety about computers.     

Tachistoscopic software for Macintosh computers

The requirements for accurate presentation of short-duration stimuli on, raster display monitors are summarized, and existing packages for instantiating such displays are evaluated. A new soft-ware package that provides tachistoscopic functions for Macintosh computers is described. This software, called MacTach, performs video-buffer switching, allowing tachistoscopic presentation of large or multibit depth images that is not available with alternative methods. Compatibility routines and verification procedures allow compatibility with all Macintosh computers. Applications for animation, motion, and dichoptic presentations are discussed.     

Tachistoscopic software for the Macintosh

The emulation of a tachistoscope with a Macintosh microcomputer and Pascal language is presented here. The software described is a complete program for the presentation of textual stimuli on the Macintosh screen and includes the recording of reaction times. The stimulus coordinates on the screen are user defined and variable from trial to trial for specific visual angles. The position of a fixation point on the screen and the distance between the subject and the plane of the screen, as well as the particular screen resolution, are taken into account in computing the visual angle.     

A Macintosh II psychophysiology system

An integrated data-acquisition and -analysis system for doing psychophysiology on Macintosh II computers is described. Plug-in cards allow the system to meet the technical demands of psychophysiological research—including 24-channel, 12-bit resolution and sampling of scalp potentials taken at a sampling rate of 400 Hz. Use of a compiled graphical data-flow language to program this equipment brings the implementation of sophisticated methods within the reach of many experimenters. Some applications of this system to multichannel evoked potential research are described, including P50 conditioned-disinhibition and augmenting/reducing experiments. Extensions of the system into such areas as topographical brain mapping are also noted.     

Student statistics programs for the Macintosh

This paper reviews 15 statistics programs for the Macintosh. All are intended for student use, often in conjunction with a statistics course, and are available for under $100. Of the general-purpose programs, Data Desk and StatView offer the most appealing combination of features, Macintosh interface, and student-accessible manual. Minitab is also recommended, especially in situations where some students will be using Macs and others using PCs. In addition to the analysis-only programs, two other applications present interesting combinations of statistics and other features. DataSim offers outstanding data generation and experiment simulation along with very complete, and psychology-oriented, statistical analysis. HyperStat combines an entire statistics textbook in hypertext format with a complete data analysis package. Finally, for special situations where simple statistics are all that are required, InStat is recommended because of its tutorial features and very simple interface.     

Modal logics with the Macintosh rule

Conclusion Having gained some idea of what MacIntosh logics there are, we conclude this paper with a remark about the totality of them. Let theterritory of a rule or condition be the class of all modal logics that have the rule or satisfy the condition. What is MacIntosh territory, the class of all normal logics with the MacIntosh rule, like? What is its structure?We are especially indebted to Max Cresswell, Rob Goldblatt, Steve Kuhn, Jack MacIntosh, Tamara Ollenberg, and Tim Williamson for very helpful contributions along the way to the present version of this essay. Elements of it were presented by Chellas at a miniconference on Issues in Philosophical and Mathematical Logic, in Devonport, New Zealand, 11–12 May 1991, at a South West Logic Workshop in Seattle, Washington, 20 July 1991, and at a meeting of the Florida Philosophical Association in Boca Raton, Florida, 8 November 1991. We wish to thank all who offered comments at those gatherings. An earlier version of the paper appeared in the Auckland Philosophy Papers series of the Department of Philosophy, University of Auckland, in May 1991.     

Macintosh analogue of the rotary pursuit task

Pursuit tracking, a perceptual motor-skill task, has had wide application in many areas of psychology. The task is usually administered with a mechanical device in which subjects try to maintain a contact between a stylus and a disk on a rotating platter. A pursuit-tracking task that can be administered on a Macintosh computer is described. Subjects try to keep a crosshair cursor on top of a moving circular target. The cursor can be controlled by commonly used Macintosh ADB devices such as a joystick. The computer version has several important advantages: it offers more task flexibility and more accurate dependent measures of performance, and it is inexpensive.     

Toolbox-based routines for Macintosh timing and display

Pascal routines are described for several real-time operations on Macintosh computers. Methods are presented for millisecond timing and for high-speed transfer of arbitrary bit-image displays to the screen. All routines are based on Toolbox procedures available on virtually all Macintosh computers.