The property transmission hypothesis: a possible explanation for visual impressions of pulling and other kinds of phenomenal causality

Under certain circumstances, stimuli involving two moving objects that do not come into contact reliably give rise to the illusory perceptual impression that one of the objects is pulling the other, as if there is an unseen connection between them. It is proposed that the conditions determining the occurrence of this impression can be explained as cases of application of the property-transmission hypothesis. This is a general hypothesis that causal objects operate in part by transmitting some of their own properties to effect objects under conditions where the causal object is active, where there are cues to the occurrence of generative transmission between the causal object and an effect object, and where there is a time-ordered relation of resemblance between properties of the causal object and those of the effect object. This hypothesis predicts that the pulling impression should occur only when the effect object adopts kinematic properties (speed and direction) that resemble those of the causal object. An experiment is reported that supports this prediction.     

The effects of verbal and visual interference on impressions: An associated-systems approach

This study investigated associated-systems theory's prediction that interference with the visual or verbal mental systems should alter person impressions by removing or reducing the impact of the information represented within those systems, while accentuating the influence of other information. In Experiment 1, interference with the verbal system decreased the influence of verbal information on trait judgments and increased the influence of visual information on attractiveness and liking judgments. In Experiment 2, visual interference decreased the impact of visual information on attractiveness judgments and, at least for attractive targets, increased the impact of verbal information on trait and liking judgments. These results support the premise that impressions consist of representations allied with separate processing systems and that those impressions can be affected by other activities involving those systems.     

The role of visual attention in action priming

It has been demonstrated that the task-irrelevant left–right orientation of an object is capable of facilitating left–right-hand responses when the object is orientated towards the responding hand. We investigated the role of attention in this orientation effect. Experiment 1 showed that object orientation facilitates responses of the hand that is compatible with the object's orientation, despite the entire object being irrelevant. However, when a task-relevant fixation point was displayed over the prime object in Experiment 2, the effect was not observed. Together Experiments 1 and 2 suggest that the orientation information of viewed objects primes the action selection processes even when the object is irrelevant, but only when attention is not allocated to a competing stimulus during the prime presentation. Experiment 3 suggested that the elimination of the effect in Experiment 2 could not be attributed to the elimination of an attentional shift to the graspable part of the prime. Finally, Experiment 4 showed that object orientation can evoke an abstract response code, influencing the selection of finger responses.     

The role of visual attention in action priming

It has been demonstrated that the task-irrelevant left-right orientation of an object is capable of facilitating left-right-hand responses when the object is orientated towards the responding hand. We investigated the role of attention in this orientation effect. Experiment 1 showed that object orientation facilitates responses of the hand that is compatible with the object's orientation, despite the entire object being irrelevant. However, when a task-relevant fixation point was displayed over the prime object in Experiment 2, the effect was not observed. Together Experiments 1 and 2 suggest that the orientation information of viewed objects primes the action selection processes even when the object is irrelevant, but only when attention is not allocated to a competing stimulus during the prime presentation. Experiment 3 suggested that the elimination of the effect in Experiment 2 could not be attributed to the elimination of an attentional shift to the graspable part of the prime. Finally, Experiment 4 showed that object orientation can evoke an abstract response code, influencing the selection of finger responses.     

The role of visual imagery in autobiographical memory

Visual imagery plays a fundamental role in autobiographical memory, but several aspects of this role remain unclear. We conducted three experiments to explore this relationship. In the first experiment, we examined the relation between the phenomenological properties of autobiographical memory and several measures of visual-imagery ability. We found no significant positive relation between imagery ability and autobiographical memory, except on a measure of cognitive style. In a second experiment, we examined the autobiographical memories of people with different cognitive styles—namely, visualizers and verbalizers. We found that, for both kinds of participant, visual imagery was correlated with the feeling that they were reliving their memories, but auditory imagery played a greater role in verbalizers. In a third experiment, we examined the memories of individuals who had a congenital absence of visual imagery. We found that they had a deficit of auditory imagery, as well; moreover, they were much less likely than controls to feel as though they were reliving their memories. The results support the idea that visual imagery plays a vital and irreplaceable role in autobiographical recall.     

The role of priming in conjunctive visual search

To assess the role of priming in conjunctive visual search tasks, we systematically varied the consistency of the target and distractor identity between different conditions. Search was fastest in the standard conjunctive search paradigm where identities remained constant. Search was slowest when potential target identity varied predictably for each successive trial (the 'switch' condition). The role of priming was also demonstrated on a trial-by-trial basis in a 'streak' condition where target and distractor identity was unpredictable yet was consistent within streaks. When the target to be found was the same for a few trials in a row, search performance became similar to that when the potential target was the same on all trials. A similar pattern was found for the target absent trials, suggesting that priming is based on the whole search array rather than just the target in each case. Further analysis indicated that the effects of priming are sufficiently strong to account for the advantage seen for the conjunctive search task. We conclude that the role of priming in visual search is underestimated in current theories of visual search and that differences in search times often attributed to top-down guidance may instead reflect the benefits of priming.     

The role of visual communication in synchronising conversation

Previous research on visual interaction has indicated that Looking¹ may serve a number of important functions in social interaction. In particular, the apparent relationship between the timing of Looks and the patterning of speech has led to the suggestion that visual communication serves to regulate the flow of conversation and to synchronise transitions from speaker to speaker. This was tested in the present experiment by comparing face-to-face dyadic encounters with similar discussions which took place over an audio intercom link which precluded visual communication. Simultaneous speech, which resulted generally from interruptions, occurred more frequently and for longer in total face-to-face than in the audio condition, while the length of utterances and the incidence of speech disturbance were both greater in the audio condition. This pattern of findings was quite different from that predicted, and suggests that the role of visual communication is to allow participants to converse spontaneously and interrupt freely by enabling them to send and receive nonverbal signals which maintain the interaction and prevent the breakdown which interruption might otherwise threaten. Suggestions for testing this interpretation further are outlined.     

The role of visual similarity in picture categorization

Categorization is usually assumed to require access to a concept's meaning. When pictures are categorized faster than words, they are assumed to be understood faster than words. However, pictures from the same category are more similar than pictures from different categories. The present article argues that the use of visual similarity as a cue to category membership may produce the picture advantage. The visual similarity hypothesis was tested in two experiments. In the first experiment, pictures showed a disadvantage for the visually similar categories of fruits and vegetables, but showed their usual advantage for the visually dissimilar categories of fruits and animals. In the second experiment, with a mixed list design, pictures were slower only for visually similar different decisions, but showed the usual advantage for all other decisions. The reliability of visual similarity as a cue to the decision accounted well for these results. Because visual similarity can be shown to have large effects on picture categorization, the use of categorization to compare speed of understanding of pictures and words is questionable.     

The role of the amygdala in visual awareness

Pessoa and colleagues recently reported the novel finding that objective awareness of a negative stimulus is associated with coactivation of the amygdala and fusiform gyrus. Based on the neuroanatomical connections of the amygdala, we suggest that the amygdala is acting to increase neural activity in the fusiform gyrus, thereby increasing the likelihood that visual representations that have affective value reach awareness. The psychological consequence is that a person's momentary affective state might help to select the contents of conscious experience.     

The role of visual perspective in information processing

Social events can be described from the perspective of either a person in the situation in which the event occurs (e.g., “John came into…”) or that of an outside observer (“John went into…”). We find that when individuals are disposed to form visual images, they have difficulty comprehending both verbal statements and pictures when the perspective from which the event is described differs from the perspective from which they have encountered similar events in daily life. Furthermore, the disposition to form visual images increases the intensity of emotional reactions to an event when the event is described from the perspective of someone in the situation in which it occurs. These effects are not evident, however, among individuals who typically process information semantically without forming visual images.     

Forming first impressions: The role of gender and normative accuracy in personality perception

Gender is associated with interpersonal sensitivity across different domains, with females, on average, demonstrating higher levels of interpersonal sensitivity than males. What underlies these gender differences in the accuracy of first impressions of personality remains unclear. Across two large video studies and a large round-robin design, perceivers’ gender was related to the accuracy of general personality trait impressions. Specifically, female perceivers achieved higher levels of accuracy, but only with respect to normative accuracy or perceiving what others are like in general. There were no significant gender differences in terms of distinctive accuracy or perceiving how others are different from the average person. Discussion considers how these findings relate to previously established gender differences in other domains of interpersonal sensitivity.     

Visual impressions of causality: Effects of manipulating the direction of the target object's motion in a collision event

Stimuli in which a moving object (A) contacts a stationary one (B) and the latter then moves off tend to give rise to visual impressions of causality. In two experiments the angle of Object B's path of motion to that of Object A was manipulated, and in one of these the point of contact of Object A with Object B was also manipulated. The ampliation hypothesis (Michotte, 1963) predicts that the causal impression should be strongest when Object B continues Object A's direction of motion, regardless of point of contact. In fact the causal impression was strongest when the angle of Object B's motion matched the angle that would actually occur for the point of contact in the stimulus. This supports a hypothesis that the causal impression is a product of experience with real object collisions.     

Sometimes it does hurt to ask: The constructive role of articulating impressions

Decisions can sometimes have a constructive role, so that the act of, for example, choosing one option over another creates a preference for that option (e.g., , ,  and ). In this work we explore the constructive role of just articulating an impression, for a presented visual stimulus, as opposed to making a choice (specifically, the judgments we employ are affective evaluations). Using quantum probability theory, we outline a cognitive model formalizing such a constructive process. We predict a simple interaction, in relation to how a second image is evaluated, following the presentation of a first image, depending on whether there is a rating for the first image or not. The interaction predicted by the quantum model was confirmed across three experiments and a variety of control manipulations. The advantages of using quantum probability theory to model the present results, compared with existing models of sequence order effects in judgment (e.g., Hogarth & Einhorn, 1992) or other theories of constructive processes when a choice is made (e.g.,  and ) are discussed.     

The role of visual information in the processing of

Visual information provided by a talker’s mouth movements can influence the perception of certain speech features. Thus, the “McGurk effect” shows that when the syllable /bi/ is presented audibly, in synchrony with the syllable /gi/, as it is presented visually, a person perceives the talker as saying /di/. Moreover, studies have shown that interactions occur between place and voicing features in phonetic perception, when information is presented audibly. In our first experiment, we asked whether feature interactions occur when place information is specified by a combination of auditory and visual information. Members of an auditory continuum ranging from /ibi/ to /ipi/ were paired with a video display of a talker saying /igi/. The auditory tokens were heard as ranging from /ibi/ to /ipi/, but the auditory-visual tokens were perceived as ranging from /idi/ to /iti/. The results demonstrated that the voicing boundary for the auditory-visual tokens was located at a significantly longer VOT value than the voicing boundary for the auditory continuum presented without the visual information. These results demonstrate that place-voice interactions are not limited to situations in which place information is specified audibly. In three follow-up experiments, we show that (1) the voicing boundary is not shifted in the absence of a change in the global percept, even when discrepant auditory-visual information is presented; (2) the number of response alternatives provided for the subjects does not affect the categorization or the VOT boundary of the auditory-visual stimuli; and (3) the original effect of a VOT boundary shift is not replicated when subjects are forced by instruction to \ldrelabel\rd the /b-p/auditory stimuli as/d/or/t/. The subjects successfully relabeled the stimuli, but no shift in the VOT boundary was observed.     

The privileged role of location in visual working memory

Reports have conflicted about the possible special role of location in visual working memory (WM). One important question is: Do we maintain the locations of objects in WM even when they are irrelevant to the task at hand? Here we used a continuous response scale to study the types of reporting errors that participants make when objects are presented at the same or at different locations in space. When several objects successively shared the same location, participants exhibited a higher tendency to report features of the wrong object in memory; that is, they responded with features that belonged to objects retained in memory but not probed at retrieval. On the other hand, a similar effect was not observed when objects shared a nonspatial feature, such as color. Furthermore, the effect of location on reporting errors was present even when its manipulation was orthogonal to the task at hand. These findings are consistent with the view that binding together different nonspatial features of an object in memory might be mediated through an object’s location. Hence, spatial location may have a privileged role in WM. The relevance of these findings to conceptual models, as well as to neural accounts of visual WM, is discussed.     

The role of structure in infant visual pattern perception

The research of the authors and others on the role of structure in infant visual pattern perception is reviewed. Two new experiments are reported on preference for symmetry in infants. It is shown that infants reliably prefer patterns with multiple axes of bilateral symmetry relative to asymmetrical patterns. Also, the results demonstrate that vertically oriented single axis bilateral symmetry is more salient than horizontally oriented symmetry in infants as it is in adults. It is argued that sensitivity to various kinds of pattern structure reflects fundamental operations of the visual system.     

The role of visual attention in saccadic eye movements

The relationship between saccadic eye movements and covert orienting of visual spatial attention was investigated in two experiments. In the first experiment, subjects were required to make a saccade to a specified location while also detecting a visual target presented just prior to the eye movement. Detection accuracy was highest when the location of the target coincided with the location of the saccade, suggesting that subjects use spatial attention in the programming and/or execution of saccadic eye movements. In the second experiment, subjects were explicitly directed to attend to a particular location and to make a saccade to the same location or to a different one. Superior target detection occurred at the saccade location regardless of attention instructions. This finding shows that subjects cannot move their eyes to one location and attend to a different one. The results of these experiments suggest that visuospatial attention is an important mechanism in generating voluntary saccadic eye movements.