The discrimination of structure in vectorgraphs: Local and global effects

Many recent electrophysiological studies have demonstrated specificity for orientation and position tuning in single units of the visual system. Psychophysical investigations have produced complementary evidence for orientation and position coding in vision which is usually interpreted in terms of the underlying neuronal properties. To date, no studies have endeavored to relate such “local” receptive field response profiles to more “global” or field-specific aspects of the input signal. In a series of experiments, we have investigated orientation/position sensitivity as a function of general orientation and position rules governing line element, or “vectorgraph,” displays. We have discovered with such vectorgraph images that individual element acuities are determined by the field structures present. These results show that there are specific “top-down” components even to basic orientation/position coding in the visual system     

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.     

Pronoun disambiguation: Accessing potential antecedents

Two general classes of pronoun disambiguation processes are considered. In reading “Jack threw a snowball at Phil, but he missed,” both possible antecedents of “he” (“Jack” and “Phil”) may be accessed initially. Or, the actual antecedent alone may be accessed after sufficient semantic context is encoded. To evaluate these alternatives, a yes-no-probe recognition task was used to measure priming of the potential antecedents in sentence comprehension. Subjects read sentences similar to the example and were presented a test word immediately following each sentence. Response times for the actual antecedent (“Jack”) and nonantecedent (“Phil”) probes were obtained. Results indicated that the nonantecedent as well as the antecedent was activated (accessed) in pronoun disambiguation. This conclusion was not affected by the ordering of the antecedent and nonantecedent in the first clause.     

Apple Picker: Computer software for studying human responding on concurrent and multiple schedules

Apple Picker, a software package for the Apple II microcomputer, is described. Subjects respond by searching for “apples” in two “orchards.” “Attempted pickings” may be reinforced according to random ratio or interval schedules. “Search” responses are recorded and may be examined either as rates of responding in the two orchards or visually as paths the subject has traced during the session.     

PsyExper: Another experimental generation system for the IBM PC

A system for creating and running psychological experiments on IBM PC compatible computers is described. The system attempts to reconcile the demand for flexible and powerful experimental software with the need for systems that are easy to understand and modify. Experiments are created by building a series of displays with variable compositions, durations, and stimulus onset asynchronies. The number, type, location, color, and perceptibility of stimuli within these displays can be systematically varied. Reaction time and other response measures can be collected from the keyboard, a voice-activated switch, or other external switches. The system is assembled from a series of Turbo Pascal and Turbo C routines that may be modified by the user or incorporated into new routines. Custom modules can be added easily to any of the system’s menus. The system is best suited for discrete trial experiments with target detection, perceptual priming, lexical decision, or recognition memory tasks.     

The history of a catatonic dog

This article is a condensed life-history of a dog (“V3”) born and reared in the Pavlovian Laboratory and studied until his death in 1961. A detailed study was made of his pathologic development, his relations to people, and the effects of drugs. Measurements recorded were heart rate, blood pressure, respiration, 24-hour activity, sexual reflexes, general behavior. Although early experiments were done chiefly for recording and were not considered noxious or traumatic, this dog’s general development and symptoms seem to have been “constitutionally” rather than environmentally determined. His external behavior was strikingly similar to that of a catatonic patient-flexibilitas cerea, general immobility. Of particular interest was the “Effect of Person”: in the presence of all humans who confronted him he showed catatonic postures, cardiovascular disorders (tachycardia up to 200 beats/min., bradycardia to 12 beats/min., drop of blood pressure from 150 to 75 mm Hg, arrest of heart-beat for as long as 8 seconds), moribund poses. His response to drugs illustrated the specificity to a definite “constitutional type”: sexual activity markedly increased by alcohol and rarely present except after administration of alcohol; no improvement after administration of tranquilizers, except alcohol and meprobamate, which made him act like a normal dog in behavior and in relations to people. His symptoms and reactions to both people and drugs were generally opposite to those of another dog, “Nick”, studied over his life span: Nick showed excessive activity in physiologic systems; hyperactivity (running); generally, improvement through “Effect of Person”; sexual inhibition with alcohol. Observations of the two dogs suggest that symptoms as well as reactions to drugs are the result of the “type” rather than the procedure used, that perhaps psychopathologic symptoms are due more to inborn constitution than to “conflict” (“collision”) between excitation and inhibition, and that neurotic or psychotic symptoms may not interfere with longevity-Nick lived to be 14 years old and died fighting; V3, who also spent most of his life in the laboratory, died at the age of 14.     

The professional ethics course

A professional ethics program was recently developed and implemented as a comparative values course at the University of Puget Sound. This article is a report ontheprogram, “Professional Ethics fora Technological Era.”The program consists of two courses: “Ethics for a Technological Era,” and “Values: Conflict and Compromise.” The first course emphasizes skills necessary for ethical decision making. The second course follows through with an opportunity to apply these skills to a major social policy program. This article discusses the approach to ethics, and participation, and the theoretical approach, including role modeling, speakers, and reading and discussion material, for “Professional Ethics in a Technological Era.”     

Eta,disco, odisco,andF

Two coefficients are proposed for measuring the extent of overlap in distributions as a direct function of the variance between the arithmetic means (“disco” and “odisco”). They are designed to answer such questions as: “Given the value of a numerical variablex, to which population should an individual be assigned so that minimum error would be incurred?” This is just the reverse of the question addressed by ANOVA. These coefficients are shown to be analytic inx and they are related to Pearson's eta and Fisher'sF. Extensions of these coefficients (designed for univariate, one-way discrimination) tok-way and multivariate discriminant analysis and measurement of “interaction” are suggested.     

Using HyperCard to administer a figural test on the Apple Macintosh

To date, applications of automated assessment techniques in personality testing have largely been limited to objective personality instruments with text stimuli; few assessment applications have involved graphic stimuli. Although projective personality instruments generally include ambiguous graphic or pictorial stimuli, computer applications with these procedures have been limited to automated scoring and interpretation, administration of sentence completion devices employing text stimuli, and the use of mechanical methods rather than computer graphics to display visual stimuli. In the present report, we describe a Macintosh HyperCard application for administering an objective personality test with visual stimuli, the Barron-Welsh Revised Art Scale of the Welsh Figure Preference Test. This test consists of a series of figural stimuli and a binary “like”/“dislike” response format, and it thus represents an administration procedure between standard objective self-report inventories involving text stimuli and a “true”/“false” response or variant, and tests such as the Rorschach or TAT that are both figural and free-response. The HyperCard language provides a variety of promising techniques useful for microcomputer test administration.     

Confidence ratings in speech perception research: Evaluation of an efficient technique for discrimination testing

Discriminability of voice onset time was determined for four naive Ss in order to evaluate the relative efficiency of a testing procedure which utilized confidence ratings along with the conventional oddity task. Ss rated their judgments on oddity trials as “very very sure,” “somewhat sure,” or “just guessing.” Each S’s discrimination scores were given weights according to his ratings, yielding functions that were compared with those computed using unweighted percent correct scores. The confidence-rating technique produced readily interpretable results with about one-third as many judgments as are needed when the conventional procedure is used. Possible problems with the interpretation of the functions and the generalizability of the technique are discussed.     

The place of the conditioned reflex in psychology and psychiatry: Reply to reese,dykman, and peters

Razran’s “The Place of the Conditional Reflex in Psychology and Psychiatry” delivered at GAP Symposium No. 9 traced historically the influence of Russian physiology on American behavior systems, first in the classical Watson period and then in present-day Neobehaviorism. The address collated Pavlovianism and Behaviorism, and mentioned recent Soviet emphasis of interoceptive, semantic, and compound-stimulus conditioning. Within the limits of time, it dealt with group developments and not with individual contributions. And it assumed that a behavior system comprises both normal and abnormal aspects; that is, the basics of both psychology and psychiatry. The assertion by Reese, Dykman and Peters that “Psychiatrists tend to avoid contributions of experimental psychologists and vice versa” is not shared by Razran, nor, he believes, by American psychiatry and experimental psychology as such. And the assertion is contrary to the Pavlovian tradition. Pavlov’s first, 1903, publication on conditioned reflexes was entitled “Experimental Psychology and Psychopathology in Animals” which he later renamed “the physiology and pathology [or pathophysiology] of higher nervous activity.”     

Middlesex: A Pastoral Theological Reading

This article, written for the Group for New Directions in Pastoral Theology’s conference on the theme of “Emotion, Mood, and Temperament,” focuses on Middlesex, a Pulitzer Prize-winning novel by Jeffrey Eugenides, Professor of Creative Writing in the Lewis Center for the Arts at Princeton University. The novel, set in 20th century America and written as a fictional memoir, is a coming-of-age story of Cal/Calliope, a man with an intersex condition caused by 5-alpha-reductase deficiency. The mission statement of the Intersex Society of North America (ISNA) states that the organization is “devoted to systemic change to end shame, secrecy, and unwanted genital surgeries for people born with an anatomy that someone decided is not standard for male or female.” This essay employs the resources of pastoral theology to assist in the project of ending shame regarding intersex conditions by offering a pastoral theological reading of Middlesex. As such, this essay is an example of the discipline of pastoral theology being employed in the field of medical humanities in particular and the field of clinical humanities more broadly, and it also serves as an example as to how one might offer a pastoral theological reading of a novel.     

A hierarchical LSI-11 system for real-time control,interevent time storage,and data analysis

A general-purpose laboratory computer system using two Digital Equipment Corporation LSI-11 s in a master-slave relationship is described. The implementation includes hardware to install an LSI-11 as a slave parallel processor, to provide special-purpose functions such as a real-time clock and a 4K FIFO interprocessor buffer, and to establish a bus that permits the use of inexpensive interfaces to experimental equipment. The slave processor generates a complete log of each input or output event. Data in the form of the time of each event are continuously passed through the FIFO to a foreground task in the main LSI-11, which in turn stores the raw data on a hard disk. A macro library allows the easy development of experimentcontrol programs. A library of FORTRAN routines provides a pointer-based conditional and iterative search facility that can sift out any specifiable event or set of events from the data records for subsequent analysis. This computer system provides the user with an inexpensive facility to run up to 32 simultaneous experiments with complete data logging in foreground while program development, analysis, and word processing are concurrently being done in background.     

Zombie Alleluias: Learning to Live in the Space Between Worlds

This essay was delivered as the Baer Seminar on Pastoral Care at an alumni/ae reunion of Princeton Theological Seminary on October 22, 2013, and at a Princeton Seminary alumni/ae gathering at Preston Hollow Presbyterian Church in Dallas, Texas, on February 10, 2014. It considers an increasing fascination with zombies in recent American cultural life as a means by which individuals attempt to cope with anxieties related to the rise of political and religious extremism in the post-9/11 landscape. Building on Freud’s recognition of fundamentalist tendencies within the human psyche and his sense that modern persons are living psychologically “beyond their means,” it calls for an empathic embrace of the complexities of what Donald Capps deems the “ecumenical self” as a path toward engaging personal threats within and without.     

Electrooculographic indices of changes in simulated flying performance

Recent investigations have revealed statistically reliable relationships between signal detection by human subjects performing vigilance tasks and changes in the electrophysiologically recorded waveform of the eyeblink. Thus, this relatively simple and easy-to-obtain measure may have potential use as a predictor of impaired performance. This report describes a study in which eyeblink data were recorded on analog tape while subjects (instrument-rated pilots) “flew” a computer-generated flight plan in a General Aviation Trainer (GAT-1). Eyeblink data were reduced and scored with an adaptation of software from the Washington University Behavioral Research Laboratory. Subjects’ “flying” performance was evaluated with the Pilot Performance Evaluating System (PPES) implemented on a Digital Equipment Corporation (DEC), PDP-11/34 computer. The PPES samples each of four primary flight instruments once per second. It scores performance by generating a combined error score for each maneuver it assigns on the flight-plan display in the cockpit. The PPES/GAT-1 linkup has proved to be a valuable research tool with which to realistically evaluate stress effects and physiological correlates of flying performance in a laboratory setting. This study examined the relationships between eyeblink and flying performance scores collected during a pilot-fatigue study. Analysis of the data supports the use of computers cored eye movement measures as predictors of flying performance decrements.     

Cardiac arrhythmias in the monkey during classically conditioned fear and excitement

Rhesus monkeys(Macaca mulatto) were tested in classic aversive and appetitive conditioning paradigms following complete coronary artery occlusion (CO) to test the hypothesis that “emotional stress” induces ventricular arrhythmias. Findings were based upon conditioning trials conducted for one or more weeks after occlusion in 13 animals. When all data from each animal for the week following CO were considered, there was no demonstrable tendency for arrhythmias to increase during “fear” conditioned to unavoidable electric shock or during “excitement” in anticipation of food. However, selected trials from six monkeys did reveal instances when changes in the frequency of occurrence of arrhythmias were coupled with behavioral conditioning. While analysis of these trials did not reveal any simple relationship between emotional stress and the development of ventricular arrhythmias after myocardial infarction, certain of the behavioral situations may be more potentially arrhythmogenic than others. For these selected trials, with respect to control, the number of arrhythmias may have increased or decreased upon presentation of the conditional stimulus; the exact response appears to depend upon the immediate physiologic status of the animal as well as on the behavioral condition. “More stressful” situations, such as aversive conditioning, are not necessarily associated with greater numbers of arrhythmias than were “less stressful” situations, such as appetitive conditioning. Arrhythmias appear to occur more frequently when an animal’s heart rate is within a given range; this may reflect underlying cardiac sympathetic and parasympathetic nerve activity.     

Sex-role behavior and obedience to authority: A field study

Obedience by male and female subjects to male and female experimenters was investigated under various conditions of “perceived legitimacy.” The procedure involved an experimenter stopping a subject who was about to cross a street at a particular crosswalk, the subject was then instructed to cross at another designated location. The dependent variable was the level of obedience to these instructions. The four main factorial independent variables were the sex of the experimenter, the sex of the subject, and two conditions of “perceived legitimacy” (presence or absence of a “uniform,” presence or absence of an “explanation”). Significant results were obtained for the uniform and sex of subject main effects (more obedience with a uniform, more disobedience by females). Additional analyses indicated that “older” subjects disobeyed more often than “younger” ones, that “formally” dressed subjects disobeyed more often than “informally” dressed ones, and that ethnic minority group experimenters were disobeyed significantly more often than Caucasian experimenters. Significant interactions were also obtained, mainly due to the behavior of the younger men and the older women. Male and female experimenters were obeyed equally, in general. The results are discussed in relation to sex-role prejudice and discriminatory behavior.     

Visibility of an afterimage in the presence of a second afterimage

Visibility of an afterimage has been measured for a single rectangular bar on its own and in the presence of a second bar. Visibility of each bar is increased if the two bars are in the same orientation and closer than 1 deg (this effect being called “facilitation”) and is decreased if the bars are in different orientations (this effect being called “inhibition”). These interactions also depend on the relative size of the bars. If a pattern of two bars is viewed dichoptically, rivalry between the bars occurs causing a mutual decrease in visibility. The rivalry effect and the orientation-specific effects discussed above are additive in the dichoptic viewing condition. The orientation-specific effects have been likened to those found in other psychophysical studies of angle detection.     

Ms. and the manager: A tale of two stereotypes

Recent research on the Ms. stereotype suggests a potentially important exception to the strong link between gender and managerial stereotypes observed in the 1970s. Specifically, we hypothesized that a woman who prefers “Ms.” as her title of address would be seen by perceivers of both sexes as more similar in the “requisite” traits of a successful, middle manager than would a woman who prefers a traditional title of address for herself. These hypotheses were tested by having respondents rate a “successful, middle manager” or other stimulus persons varying in titles of address, sex, and marital status. Correlational analyses of respondents' ratings of stimulus persons yielded strong support for the hypotheses. That is, a woman preferring Ms. as her title of address was seen by adult perceivers of both sexes as possessing the “requisite” personality characteristics of a successful, middle manager; whereas a traditionally titled woman was not. Implications of these findings are discussed.