Kazuo Fujita
Biographic Data
| ID | 5140193 |
|---|---|
| NAME | Kazuo Fujita |
| GIVEN NAMES | Kazuo |
| FAMILY NAME | Fujita |
| SIGNATURE | FUJITA K |
| AFFILIATIONS | Kyoto University |
| VERIFIED | No |
| TOTAL WORKS | 29 |
| TOTAL CITATIONS | 4 |
| WORKS AS AUTHOR | 28 |
| WORKS AS EDITOR | 1 |
| FIRST PUBLICATION YEAR | 1982 |
| LATEST PUBLICATION YEAR | 2020 |
| H-INDEX | 1 |
Capuchin monkeys (Sapajus apella) failed to seek information for their potential forgetting in a computerized task
Investigating reactions of squirrel monkeys (Saimiri sciureus) towards unequal food distributions in a tray-pulling paradigm
Infant monkeys’ concept of animacy
Acquisition of a Same-Different Discrimination Task by Pigeons ( Columba Livia )
Four homing pigeons were trained to discriminate two figures simultaneously presented on an LCD screen. The figure was either a rectangle (A) or a square (B), and four combinations of the two figures, AA, AB, BA, BB, appeared in a pseudo-randomized order. The pigeons' task was to peck one of these figures based upon whether the two figures were identical or not. One pigeon successfully learned this discrimination, with proportions of correct resp…
Capuchin monkeys (Cebus apella) modify their own behaviors according to a conspecific’s emotional expressions
Flexibility in the use of requesting gestures in squirrel monkeys ( Saimiri sciureus )
Three squirrel monkeys, trained to make a requesting gesture, were tested in the presence of a human assistant whose visual attention varied across trials. When food was available in one dish and an empty dish was nearby, the monkeys pointed overwhelmingly toward the former, regardless of where the assistant was looking. Looking at the assistant while pointing (“monitoring”) peaked when she looked at them and when she attempted to engage them in …
A comparative psychophysical approach to visual perception in primates
Nine‐ to 11‐month‐old infants' reasoning about causality in anomalous human movements 1
Two habituation experiments investigated 9–11‐month‐old infants' reasoning about causality in anomalous human movements. During habituation, infants saw an event in which a person walked toward a stationary person behind an occluder who fell down after an interval. Then, the infants were tested with two events without the occluder: the contact event in which the first person pushed the second one to fall down and the no‐contact event in which the…
Origins of the Social Mind
Japanese macaques form a cross-modal representation of their own species in their first year of life
Transfer from “edible” categorization training to feeding behavior in pigeons ( Columba livia ) 1
We investigated a transfer from an operant experimental situation to a feeding situation in pigeons using real objects as stimuli. Four pigeons were trained in an operant box to categorize familiar edible items as positives and inedible items as negatives with a go/no‐go procedure. Next, two pairs of unfamiliar edible items were added as stimuli. One of the paired stimuli was arbitrarily assigned as positive and the other as negative. We tested t…
Demonstration of a genotype–phenotype correlation in the polymorphic color vision of a non‐callitrichine New World monkey, capuchin ( Cebus apella )
Color‐vision polymorphism in New World monkeys occurs because of an allelic polymorphism of the single‐copy red‐green middle‐to‐long‐wavelength‐sensitive (M/LWS) opsin gene on the X chromosome. Because color‐vision types can readily be estimated from allelic types of the M/LWS opsin gene, this polymorphic system offers researchers an excellent opportunity to study the association between vision and behavior. As a prerequisite for such studies, ge…
Advantage of dichromats over trichromats in discrimination of color‐camouflaged stimuli in nonhuman primates
Due to a middle‐ to long‐wavelength‐sensitive (M/LWS) cone opsin polymorphism, there is considerable phenotypic variation in the color vision of New World monkeys. Many females have trichromatic vision, whereas some females and all males have dichromatic vision. The selective pressures that maintain this polymorphism are unclear. In the present study we compared the performance of dichromats and trichromats in a discrimination task. We examined t…
How do nonhuman animals perceptually integrate figural fragments? 1
Visual information available from the environment is often fragmented in time and space. Integrating such fragmentary information is essential for animals to recognize meaningful objects surrounding them. It has been well‐documented that humans perceptually organize visual inputs. In nonhumans, on the other hand, little has been known about their process of perceptual organization. This paper focuses amodal completion in nonhuman species as one o…
Perceptual organization of motions in pigeons ( Columba livia ) 1
We investigated whether pigeons perceived relative motion of more than one object. We trained pigeons to match a white target dot moving vertically at a constant speed to one color and the same dot moving diagonally to another. In Experiment 1, we presented an additional yellow dot (accompanying dot) moving horizontally near the target. We hypothesized that the pigeons would match the diagonal motion to the color for “vertical motion” and vice ve…
Month‐old Infants’ Inference of Invisible Agent
Two habituation experiments investigated 10‐month‐old infants’ interpretation of events where a stationary object began to move without any visible causes. During habituation, infants saw that an object partly hidden by an occluder began to move away from the occluder. Then, they were tested with three test events without the occluder: the first event showed a hand pushing the object, the second event showed a hand failing to touch the object, an…
How do 8‐month‐old infants recognize causality in object motion and that in human action? 1
In Experiment 1, 8‐month‐old infants were first habituated to the event in which a moving object collided with another behind an occluder, then they were shown the two test events with no occluder: the contact event, in which the two objects actually collided, and the non‐contact event, in which the second object started to move without contact with the first. The infants looked at both events for an equal amount of time. In Experiment 2, in whic…
Discrimination of macaques by macaques
Perception of Object Unity in a Chimpanzee ( Pan troglodytes )
Perception of object unity was studied in an 18‐year‐old female chimpanzee ( Pan troglodytes ) using a two‐choice delayed matching‐to‐sample task. The subject was trained with two rod‐shaped figures which were exactly identical except that one of them had a small gap at its center. After mastering this baseline task, she was shown the figure with its center occluded by a colored rectangle. We examined the perception of the subject's matching resp…
Linear perspective and the Ponzo illusion
Rhesus monkeys trained to classify bars of different lengths as “long” or “short” were tested for their bias of this classification when photographic linear perspective was superimposed on the bar. The photograph was either an upright or an upside down picture of the landscape that provided good linear perspective to human eyes. In Experiment 1, these photographs appeared together with the upward‐converging lines. The rhesus monkeys reported “lon…
Visual preference for closely related species by Sulawesi macaques
Five species of Sulawesi macaques were exposed to pictures of macaques, including all seven species living in Sulawesi island, Indonesia. The subjects were either pets or monkeys kept at the zoo. The duration of visual fixation to the pictures was in general longer for pictures of the subject's own species than those of the others. Such visual preference was in general clearer in males than in females. This suggests that Sulawesi macaques discrim…
Role of some physical characteristics in species recognition by pigtail monkeys
Development of visual preference for closely related species by infant and juvenile macaques with restricted social experience
Emergence of Symmetry in a Visual Conditional Discrimination by Chimpanzees ( Pan Troglodytes )
In Exp. 1, three young chimpanzees were trained to match red to a cross and green to a circle in an arbitrary matching-to-sample task. After acquisition of this task, they were tested for the emergence of associative symmetry of these conditional relations using the trials on which shapes were presented as samples and colors as comparisons. One of the three chimpanzees showed statistically significant accuracy on these test trials. This successfu…
Species preference by infant macaques with controlled social experience
An analysis of stimulus control in two-color matching-to-sample behaviors of Japanese monkeys ( Macaca fuscata fuscata )
Matching behaviors of Japanese monkeys were analyzed. In Experiment 1, two subjects trained on a matching-to-sample task with red and purple. After acquisition, transfer of this were discrimination to yellow and yellowgreen was tested with “non-effective” trials inserted among baseline trials. In non-effective trials, intertrial interval immediately followed the subject's response without differential reinforcement. Although this procedure guaran…
Acquisition and transfer of a higher-order conditional discrimination performance in the Japanese monkey
Two Japanese monkeys were trained on a higher-order conditional discrimination task with two colors (red and purple) which consisted of a matching-to-sample and an oddity-from-sample discrimination. External stimuli (patterns on a key, etc.) served as conditional discriminative stimuli for matching and oddity. Both subjects mastered this complex task. Then, the stimulus control established in the training was examined with test trials inserted am…
A new procedure to study the perceptual world of animals with sensory reinforcement
Species recognition by five macaque monkeys
Species preference by infant macaques with controlled social experience
Emergence of Symmetry in a Visual Conditional Discrimination by Chimpanzees ( Pan Troglodytes )
In Exp. 1, three young chimpanzees were trained to match red to a cross and green to a circle in an arbitrary matching-to-sample task. After acquisition of this task, they were tested for the emergence of associative symmetry of these conditional relations using the trials on which shapes were presented as samples and colors as comparisons. One of the three chimpanzees showed statistically significant accuracy on these test trials. This successfu…
Role of some physical characteristics in species recognition by pigtail monkeys
Development of visual preference for closely related species by infant and juvenile macaques with restricted social experience
Visual preference for closely related species by Sulawesi macaques
Five species of Sulawesi macaques were exposed to pictures of macaques, including all seven species living in Sulawesi island, Indonesia. The subjects were either pets or monkeys kept at the zoo. The duration of visual fixation to the pictures was in general longer for pictures of the subject's own species than those of the others. Such visual preference was in general clearer in males than in females. This suggests that Sulawesi macaques discrim…
Linear perspective and the Ponzo illusion
Rhesus monkeys trained to classify bars of different lengths as “long” or “short” were tested for their bias of this classification when photographic linear perspective was superimposed on the bar. The photograph was either an upright or an upside down picture of the landscape that provided good linear perspective to human eyes. In Experiment 1, these photographs appeared together with the upward‐converging lines. The rhesus monkeys reported “lon…
Discrimination of macaques by macaques
Perception of Object Unity in a Chimpanzee ( Pan troglodytes )
Perception of object unity was studied in an 18‐year‐old female chimpanzee ( Pan troglodytes ) using a two‐choice delayed matching‐to‐sample task. The subject was trained with two rod‐shaped figures which were exactly identical except that one of them had a small gap at its center. After mastering this baseline task, she was shown the figure with its center occluded by a colored rectangle. We examined the perception of the subject's matching resp…
How do 8‐month‐old infants recognize causality in object motion and that in human action? 1
In Experiment 1, 8‐month‐old infants were first habituated to the event in which a moving object collided with another behind an occluder, then they were shown the two test events with no occluder: the contact event, in which the two objects actually collided, and the non‐contact event, in which the second object started to move without contact with the first. The infants looked at both events for an equal amount of time. In Experiment 2, in whic…
Month‐old Infants’ Inference of Invisible Agent
Two habituation experiments investigated 10‐month‐old infants’ interpretation of events where a stationary object began to move without any visible causes. During habituation, infants saw that an object partly hidden by an occluder began to move away from the occluder. Then, they were tested with three test events without the occluder: the first event showed a hand pushing the object, the second event showed a hand failing to touch the object, an…
How do nonhuman animals perceptually integrate figural fragments? 1
Visual information available from the environment is often fragmented in time and space. Integrating such fragmentary information is essential for animals to recognize meaningful objects surrounding them. It has been well‐documented that humans perceptually organize visual inputs. In nonhumans, on the other hand, little has been known about their process of perceptual organization. This paper focuses amodal completion in nonhuman species as one o…
Perceptual organization of motions in pigeons ( Columba livia ) 1
We investigated whether pigeons perceived relative motion of more than one object. We trained pigeons to match a white target dot moving vertically at a constant speed to one color and the same dot moving diagonally to another. In Experiment 1, we presented an additional yellow dot (accompanying dot) moving horizontally near the target. We hypothesized that the pigeons would match the diagonal motion to the color for “vertical motion” and vice ve…
Demonstration of a genotype–phenotype correlation in the polymorphic color vision of a non‐callitrichine New World monkey, capuchin ( Cebus apella )
Color‐vision polymorphism in New World monkeys occurs because of an allelic polymorphism of the single‐copy red‐green middle‐to‐long‐wavelength‐sensitive (M/LWS) opsin gene on the X chromosome. Because color‐vision types can readily be estimated from allelic types of the M/LWS opsin gene, this polymorphic system offers researchers an excellent opportunity to study the association between vision and behavior. As a prerequisite for such studies, ge…
Advantage of dichromats over trichromats in discrimination of color‐camouflaged stimuli in nonhuman primates
Due to a middle‐ to long‐wavelength‐sensitive (M/LWS) cone opsin polymorphism, there is considerable phenotypic variation in the color vision of New World monkeys. Many females have trichromatic vision, whereas some females and all males have dichromatic vision. The selective pressures that maintain this polymorphism are unclear. In the present study we compared the performance of dichromats and trichromats in a discrimination task. We examined t…
Japanese macaques form a cross-modal representation of their own species in their first year of life
Transfer from “edible” categorization training to feeding behavior in pigeons ( Columba livia ) 1
We investigated a transfer from an operant experimental situation to a feeding situation in pigeons using real objects as stimuli. Four pigeons were trained in an operant box to categorize familiar edible items as positives and inedible items as negatives with a go/no‐go procedure. Next, two pairs of unfamiliar edible items were added as stimuli. One of the paired stimuli was arbitrarily assigned as positive and the other as negative. We tested t…
Origins of the Social Mind
A comparative psychophysical approach to visual perception in primates
Nine‐ to 11‐month‐old infants' reasoning about causality in anomalous human movements 1
Two habituation experiments investigated 9–11‐month‐old infants' reasoning about causality in anomalous human movements. During habituation, infants saw an event in which a person walked toward a stationary person behind an occluder who fell down after an interval. Then, the infants were tested with two events without the occluder: the contact event in which the first person pushed the second one to fall down and the no‐contact event in which the…
Flexibility in the use of requesting gestures in squirrel monkeys ( Saimiri sciureus )
Three squirrel monkeys, trained to make a requesting gesture, were tested in the presence of a human assistant whose visual attention varied across trials. When food was available in one dish and an empty dish was nearby, the monkeys pointed overwhelmingly toward the former, regardless of where the assistant was looking. Looking at the assistant while pointing (“monitoring”) peaked when she looked at them and when she attempted to engage them in …
Capuchin monkeys (Cebus apella) modify their own behaviors according to a conspecific’s emotional expressions
Psychology (27 works) · Biology (18 works) · Cognitive psychology (16 works) · Communication (15 works) · Zoology (15 works) · Mathematics (14 works) · Neuroscience (14 works) · Primate Behavior and Ecology (12 works) · Animal ecology (11 works) · Artificial Intelligence (11 works)