John H. Krantz

• Doctor of Philosophy
• Professor at Hanover College

For 25 years, the web has been used for psychological research (Krantz et al., 1997; Reips, 1997). While many areas of psychology have benefitted from the increased access to participants and other benefits of web-based research, one area of psychology has rarely taken advantage of the online format, that is, sensation and perception. Largely, sens...

The first papers that reported on conducting psychological research on the web were presented at the Society for Computers in Psychology conference 20 years ago, in 1996. Since that time, there has been an explosive increase in the number of studies that use the web for data collection. As such, it seems a good time, 20 years on, to examine the hea...

Naukowcy, wydawcy oraz inni ludzie ze środowiska naukowego wykazali, i nadal wykazują, duże zainteresowanie i entuzjazm dla badań za pośrednictwem internetu. Badania metodologiczne dowiodły jednak istnienia szeregu wyzwań, które powinny zostać wzięte pod uwagę przez badaczy przy planowaniu swoich działań. Artykuł prezentuje sposoby rozwiązania dzie...

Thoroughly re-imagined and retooled for the mobile web, the new release of PsychSim redefines what’s possible with interactive psychology simulations. With its new look, new format, and new resources, it immerses students in the world of psychological research like never before, placing them in the role of scientist or subject in activities that hi...

Most psychology experiments start with a stimulus, and, for an increasing number of studies, the stimulus is presented on a computer monitor. Usually, that monitor is a CRT, although other technologies are becoming available. The monitor is a sampling device; the sampling occurs in four dimensions: spatial, temporal, luminance, and chromatic. This...

This paper describes the results of two studies designed to assess the effects of stereo views and multiple display screens (providing a wide field-of-view) on a user's ability to search for target objects in a virtual world. Taken together, the results of the studies show that while subjects believe the side screens to be helpful, neither the numb...

Krantz, J.H., Dine-Young, S., Altermatt, T.W., Altermatt, E. R. & Mamberg, M. H. (2008). Encouraging Undergraduate Research: Hanover College’s Psychology Major. Chapter in R. L. Miller & R. F. Rycek’s E-book, Developing, Promoting & Sustaining the Undergraduate Research Experience in Psychology, p.78-81. [Published by the Society for the Teaching o...

This paper reports on a preliminary experiment designed to analyze the effects of multiple wall textures on a user's ability to navigate throughout a virtual environment (VE). Two subject groups searched the same maze-like VE twice for six randomly placed red spheres. The mazes for each group were of identical layout; however, the maze for group 1...

Laryngeal imaging uses optical and electronic means to visualize the larynx. Understanding some of the issues related to how the human visual system operates and how imaging systems interact with the visual system can help clarify some of the artifacts that arise from these technologies. This article describes how the visual system can construct co...

In an effort to understand the workings of the retinal receptive fields, Enroth-Cugell and Robson developed a mathematical model that utilized the difference-of-Gaussian (DOG) function, an equation in which the inhibitory portion of a receptive field is subtracted from the excitatory portion. Additions to the original Enroth-Cugell and Robson equat...

At the heart of most psychological experiments is the stimulus. It is the feature of an experiment over which the researcher has most control. However, as a concept, the stimulus has generally received very little attention for such a central feature of our experiments. There are some notable exceptions (Gibson, 1960), but generally, it appears tha...

With each new technological advance comes a change in the methods and environments of doing psychological research. The Internet-based study adds a new tool for collecting subjects that goes well beyond using introductory psychology students, phone and mail surveys, and the exhausting effort of soliciting subjects from the community. By its very na...

Most psychology experiments start with a stimulus, and, for an increasing number of studies, the stimulus is presented on a computer monitor. Usually, that monitor is a CRT, although other technologies are becoming available. The monitor is a sampling device; the sampling occurs in four dimensions: spatial, temporal, luminance, and chromatic. This...

Computers are becoming a staple of the American classroom. Nearly every student at every university and college now has access to a computer. As a result, communication between students and faculty via computer is becoming increasing popular (Quigley 1994). Likewise, computer resources and online syllabi are being used at an increasing rate. Becaus...

The Internet provides a new method to obtain subjects. Arguments supporting the use of the Internet as an experimental medium include the ease of data collection, limited resources needed, and ability to gain a sample more representative of the population. However, it has not been demonstrated that the Internet provides the conditions necessary to...

The potential impact that the World-Wide Web (WWW) will have on psychology and psychological education extends far beyond serving as a resource for information acquisition. Particularly through the WWW there is the capability to develop interactive teaching resources with integrated multimedia. These resources can take the form of tutorials or quiz...

The World-Wide Web provides an inviting opportunity to reach large numbers of people, both as an audience for psychoacoustical discussions and demonstrations and as subjects for psychoacoustical experiments. Such use of the Web poses a unique set of challenges. We present the methodologies used to prepare a multimedia primer in auditory perception...

The Internet is a vast and unorganized collection of information, making it difficult to find desired information. This paper describes the World-Wide Web (WWW) pages and Gopher directories designed to provide easy access to psychological resources set up by both the American Psychological Society (APS) and a college psychology department. The type...

This research investigated the effects of men's eyeglasses and facial hair and women's eyeglasses and hair length on the traits associated with facial schemata. One hundred and thirty-five introductory psychology students rated Photo-IdentTM composites of stimulus persons on 20 adjectival continua. A factor analysis of the scores extracted three fa...

Liquid crystal displays maintain superior contrast under bright sunlight conditions compared with cathode-ray tube displays. This attribute, along with reduced weight, volume, and power requirements, make liquid crystal displays especially desirable for use in vehicular applications. The present experiment was designed to determine the luminance re...

Color matrix displays (CMD’s) constitute a new generation of high-resolution, two-dimensional sampled visual display devices. We describe a CMD image-simulation system and a series of psychophysical image-quality experiments to investigate basic visual parameters of sampled displays. For binary CMD’s, a RGBG pixel mosaic was found to produce imagin...

Teleoperators are the humans who control devices from a “distance”. This distance may be extreme physical separation, as in the assembling of the Space Station Freedom by ground-based personnel. But the device could be the effective distance of scale, for the manipulation of microscopic structures like single living cells or the components within a...

Color matrix display (CMD) technology has evolved to the point of viability for many information display applications. The matrix-addressed color liquid crystal display (LCD) currently appears to be the most suitable CMD technology for producing full-color images. Relative to color displays based on the shadow-mask cathode ray tube (CRT), the bench...