Journal of Comparative Psychology最新文献

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Cross-modal perception of puppies and adult conspecifics in dogs (Canis familiaris). 狗对幼犬和成年同类的跨模态感知。
IF 1.1 4区 心理学
Journal of Comparative Psychology Pub Date : 2024-11-01 Epub Date: 2024-09-19 DOI: 10.1037/com0000385
Yuri Kawaguchi, Zsófia Virányi, Tamás Faragó, Ludwig Huber, Christoph J Völter
{"title":"Cross-modal perception of puppies and adult conspecifics in dogs (Canis familiaris).","authors":"Yuri Kawaguchi, Zsófia Virányi, Tamás Faragó, Ludwig Huber, Christoph J Völter","doi":"10.1037/com0000385","DOIUrl":"10.1037/com0000385","url":null,"abstract":"<p><p>Understanding conspecifics' age classes is crucial for animals, facilitating adaptive behavioral responses to their social environment. This may include gathering and integrating information through multiple modalities. Using a cross-modal preferential-looking paradigm, we investigated whether dogs possess a cross-modal mental representation of conspecific age classes. In Experiment 1, dogs were presented with images of an adult dog and a puppy projected side by side on a wall while a vocalization of either an adult dog or a puppy was played back simultaneously. To test the effect of relative body size between adult dog and puppy images, two size conditions (natural size and same size) were employed for visual stimuli. We examined dogs' looking behavior in response to cross-modally matched versus mismatched stimuli. We predicted that if dogs have cross-modal representations of age classes, they would exhibit prolonged attention toward matched images compared to mismatched ones. In Experiment 2, we administered the same paradigm within an eye-tracking experiment to further improve the measurement quality of dogs' looking times. However, dogs' looking times in either experiment did not demonstrate significant differences based on the match or mismatch between image and vocalization. Instead, we observed a size effect, indicating dogs' increased attention toward larger adult dog images compared to smaller puppy images. Consequently, we found no evidence of cross-modal representation of age class in dogs. Nonetheless, we found increased looking time and pupil size upon hearing puppy vocalizations compared to adult vocalizations in Experiment 2, suggesting that dogs exhibited heightened arousal when hearing puppy whining. (PsycInfo Database Record (c) 2024 APA, all rights reserved).</p>","PeriodicalId":54861,"journal":{"name":"Journal of Comparative Psychology","volume":" ","pages":"246-258"},"PeriodicalIF":1.1,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142301301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Differences in paradoxical choice between pigeons (Columba livia) and rats (Rattus norvegicus): The problem of cue trackability. 鸽子(Columba livia)和大鼠(Rattus norvegicus)之间矛盾选择的差异:线索的可追踪性问题。
IF 1.1 4区 心理学
Journal of Comparative Psychology Pub Date : 2024-11-01 Epub Date: 2024-05-16 DOI: 10.1037/com0000386
Patrick Anselme, Aaron P Blaisdell
{"title":"Differences in paradoxical choice between pigeons (Columba livia) and rats (Rattus norvegicus): The problem of cue trackability.","authors":"Patrick Anselme, Aaron P Blaisdell","doi":"10.1037/com0000386","DOIUrl":"10.1037/com0000386","url":null,"abstract":"<p><p>Organisms are believed to attempt to maximize their net energy intake while foraging. The paradoxical choice task shows that they may instead prefer to obtain information rather than primary reward when the outcome is uncertain. That is, they prefer stimuli that consistently predict food or no food (informative option), to stimuli that inconsistently predict both food and no food in larger amounts (noninformative option). This task also seems to indicate that some species (like pigeons, <i>Columba livia,</i> and starlings, <i>Sturnus vulgaris</i>) are more prone to choose the informative option, while other species (like rats, <i>Rattus norvegicus</i>, and humans, <i>Homo sapiens</i>) tend to favor reward procurement through the noninformative option. There is empirical evidence for and against this view. However, an analysis of the literature suggests that species differences in paradoxical choice might be less pronounced than often believed. We argue that pigeons and rats are usually not tested under conditions that are motivationally equivalent for both species-in particular, the opportunities to track consistent stimulus-food pairings are less often met in the rat studies than in the pigeon studies. (PsycInfo Database Record (c) 2024 APA, all rights reserved).</p>","PeriodicalId":54861,"journal":{"name":"Journal of Comparative Psychology","volume":" ","pages":"276-288"},"PeriodicalIF":1.1,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140946463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Serial pattern learning: Pigeons (Columba livia) prefer an improving schedule over an initially easier fixed ratio schedule. 连续模式学习:鸽子(Columba livia)更喜欢改进的时间表,而不是最初更容易的固定比例时间表。
IF 1.1 4区 心理学
Journal of Comparative Psychology Pub Date : 2024-11-01 DOI: 10.1037/com0000383
Miri Ifraimov, Daniel N Peng, Thomas R Zentall
{"title":"Serial pattern learning: Pigeons (Columba livia) prefer an improving schedule over an initially easier fixed ratio schedule.","authors":"Miri Ifraimov, Daniel N Peng, Thomas R Zentall","doi":"10.1037/com0000383","DOIUrl":"https://doi.org/10.1037/com0000383","url":null,"abstract":"<p><p>Serial pattern learning describes behavior in which a subject anticipates not only the time and effort needed for the next reinforcer but also the pattern of time and effort to reinforcers after the first. Chandel et al. (2021) found that pigeons left a progressive (increasing ratio) schedule earlier than would have been optimal. They argued that the pigeons anticipated the harder-to-obtain reinforcers beyond the next one. In the present experiments, pigeons were trained on a progressive schedule for which each reinforcer was successively easier to obtain. However, the initial choice was between a fixed ratio schedule (FR23) for which a reinforcer was easier to obtain than the first reinforcer on the improving progressive schedule (32 pecks). Delayed discounting theory suggests that the pigeons would prefer the FR23 because more immediate reinforcers should be preferred, whereas serial pattern learning suggests that the progressive schedule might be preferred because easier-to-obtain reinforcers would follow the initially harder 32 pecks. In Experiment 1, a preference for the fixed ratio schedule was not found, however, in Experiment 2, when the two alternatives were equated for the number of reinforcers that could be obtained on each trial, a significant preference for the improving progressive schedule was found. The results of Experiment 2 were consistent with the serial pattern learning hypothesis. The pigeons did not choose the more immediate reinforcer associated with fixed ratio alternative. Rather, they showed a preference for the improving progressive schedule for which later reinforcers would be easier to obtain. (PsycInfo Database Record (c) 2024 APA, all rights reserved).</p>","PeriodicalId":54861,"journal":{"name":"Journal of Comparative Psychology","volume":"138 4","pages":"232-238"},"PeriodicalIF":1.1,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142830846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Testing three primate species' attentional biases toward preferred and unpreferred foods: Seeing red or high valued food? 测试三种灵长类动物对首选和非首选食物的注意偏差:看到红色食物还是高价值食物?
IF 1.1 4区 心理学
Journal of Comparative Psychology Pub Date : 2024-08-01 Epub Date: 2024-02-29 DOI: 10.1037/com0000375
Gillian L Vale, Jesse G Leinwand, Priyanka B Joshi
{"title":"Testing three primate species' attentional biases toward preferred and unpreferred foods: Seeing red or high valued food?","authors":"Gillian L Vale, Jesse G Leinwand, Priyanka B Joshi","doi":"10.1037/com0000375","DOIUrl":"10.1037/com0000375","url":null,"abstract":"<p><p>Animals navigate complex environments that present both hazards and essential resources. The prioritization of perceptual information that is relevant to their next actions, such as accessing or avoiding different resources, poses a potential challenge to animals, one that can impact survival. While animals' attentional biases toward negatively valanced and threatening stimuli have been explored, parallel biases toward differently valued resources remain understudied. Here, we assessed whether three primate species (chimpanzees [<i>Pan troglodytes</i>], gorillas [<i>Gorilla gorilla gorilla</i>], and Japanese macaques [<i>Macaca fuscata</i>]) prioritized their attention to positively valued resources-preferred foods compared to unpreferred foods. We employed a computerized dot probe attentional bias task in which we presented participants with paired images of their preferred and unpreferred foods in randomized locations (left or right). Latencies to touch the \"probe\" that replaced either image revealed that all three species responded faster to the probe when it replaced the preferred option (χ²(1) = 284.50, <i>SE</i>² = .03, <i>p</i> < .001). The uniformity of the primates' responses hints that a propensity to prioritize highly preferred items is rooted in these primates' evolutionary past, one that may serve as a mechanism to rapidly detect and locate resources such as highly valued foods. Future research will help disentangle the role that color plays in these biases. (PsycInfo Database Record (c) 2024 APA, all rights reserved).</p>","PeriodicalId":54861,"journal":{"name":"Journal of Comparative Psychology","volume":" ","pages":"177-189"},"PeriodicalIF":1.1,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139998240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fins, feathers, fingers, and finding an explanation for the puzzle of ephemeral rewards. 鳍、羽毛、手指,为昙花一现的奖赏之谜找到解释。
IF 1.1 4区 心理学
Journal of Comparative Psychology Pub Date : 2024-08-01 DOI: 10.1037/com0000398
Michael J Beran
{"title":"Fins, feathers, fingers, and finding an explanation for the puzzle of ephemeral rewards.","authors":"Michael J Beran","doi":"10.1037/com0000398","DOIUrl":"https://doi.org/10.1037/com0000398","url":null,"abstract":"<p><p>This article discusses the ephemeral reward task and how it is not always a clear and concise choice. This is demonstrated through some animal studies involving birds and primates. This article also shows that when compared to human studies, that there are positive correlations between the BART and optimal choice in the ephemeral reward task, meaning that those who took more risks also were more inclined to be optimal. (PsycInfo Database Record (c) 2024 APA, all rights reserved).</p>","PeriodicalId":54861,"journal":{"name":"Journal of Comparative Psychology","volume":"138 3","pages":"147-149"},"PeriodicalIF":1.1,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142301308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The roles of social information, asocial information, and initial bias in nest-building decisions. 社会信息、非社会信息和初始偏差在筑巢决策中的作用。
IF 1.1 4区 心理学
Journal of Comparative Psychology Pub Date : 2024-08-01 Epub Date: 2024-02-08 DOI: 10.1037/com0000374
Benjamin A Whittaker, Gopika Balasubramanian, Andrés Camacho-Alpízar, Connor T Lambert, Lauren M Guillette
{"title":"The roles of social information, asocial information, and initial bias in nest-building decisions.","authors":"Benjamin A Whittaker, Gopika Balasubramanian, Andrés Camacho-Alpízar, Connor T Lambert, Lauren M Guillette","doi":"10.1037/com0000374","DOIUrl":"10.1037/com0000374","url":null,"abstract":"<p><p>Animals can use asocial (e.g., environmental cues) or social (e.g., conspecific behavior) information when making decisions. We investigated decisions made by zebra finches when asocial and social sources conveyed agreeing or conflicting information, and assessed the influence of initial bias on decision making. Finches completed an initial preference test ranking preference for three colors of nest-building material. Birds in the agree group (<i>n</i> = 14) then observed demonstrators build nests using nonpreferred color material (social information) that matched the environment color (asocial information). Birds in the conflict group (<i>n</i> = 15) observed demonstrators build nests with nonpreferred color material that did not match the cage environment (another nonpreferred color). A final preference test assessed any changes in color preference. The agree group reduced average preference for their initially preferred color, but did not significantly increase average preference for the asocial/social colors. The conflict group also reduced average preference for the initially preferred color and also increased preference for the socially demonstrated color. Observers with stronger initial bias were less likely to choose the socially demonstrated color than observers with weaker initial bias. This shows that social information informs nest-building decisions, even when in conflict with asocial information. However, bias influences social information use and adds nuance to how different individuals use information when making decisions. (PsycInfo Database Record (c) 2024 APA, all rights reserved).</p>","PeriodicalId":54861,"journal":{"name":"Journal of Comparative Psychology","volume":" ","pages":"190-202"},"PeriodicalIF":1.1,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139708579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Still face in pet dogs (Canis familiaris). 宠物狗(Canis familiaris)的静止面部。
IF 1.1 4区 心理学
Journal of Comparative Psychology Pub Date : 2024-08-01 Epub Date: 2024-02-15 DOI: 10.1037/com0000371
Molly Byrne, Kayla Sawyer, Angie Johnston
{"title":"Still face in pet dogs (Canis familiaris).","authors":"Molly Byrne, Kayla Sawyer, Angie Johnston","doi":"10.1037/com0000371","DOIUrl":"10.1037/com0000371","url":null,"abstract":"<p><p>Dogs are able to cooperate in reciprocal exchange with humans but little is known about the extent of these abilities (Range & Virányi, 2015). In the Still Face paradigm, infants reply to a sudden nonreciprocal facial expression with gaze aversion and an increase in re-engagement and distress behaviors (E. Tronick et al., 1978). We directly adapted this method; the dog's owner talked to the dog, then abruptly switched to a still, neutral face, maintaining eye contact. In Study 1 (<i>N</i> = 20), we found that dogs showed a significant decrease in the amount of looking at the owner in the Still Face phase, paralleling the results found in gaze aversion in infants, and they performed fewer pawing and vocalizations toward the person in the Still Face phase. In Study 2 (<i>N</i> = 60), we included one condition of continuous physical contact, and one condition that was a direct replication of the initial study without physical contact. Similar to human infants, we found a significant decrease in looking from the Interaction phase to the Still Face phase. However, in contrast to human infants, re-engagement and stress behaviors were higher in the Interaction phase than the Still Face phase. Looking and re-engagement behaviors differed based on the condition, with a smaller difference between phases in the Petting condition. These results suggest that dogs are capable of perceiving these small changes in human affect. However, unlike human infants, dogs seem to have greater expectations about physical interactions than verbal interactions, as they reacted more strongly to an Interaction phase without physical contact than the Still Face. (PsycInfo Database Record (c) 2024 APA, all rights reserved).</p>","PeriodicalId":54861,"journal":{"name":"Journal of Comparative Psychology","volume":" ","pages":"157-169"},"PeriodicalIF":1.1,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139736789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Chimpanzees (Pan troglodytes) with better task-based delay of gratification skills are rated as less impulsive, more agreeable, and smarter. 任务型延迟满足技能较好的黑猩猩(Pan troglodytes)被评为不那么冲动、更合群、更聪明。
IF 1.1 4区 心理学
Journal of Comparative Psychology Pub Date : 2024-08-01 Epub Date: 2024-02-26 DOI: 10.1037/com0000373
William D Hopkins, Chelsea M Cox, Robert D Latzman, Michael J Beran
{"title":"Chimpanzees (Pan troglodytes) with better task-based delay of gratification skills are rated as less impulsive, more agreeable, and smarter.","authors":"William D Hopkins, Chelsea M Cox, Robert D Latzman, Michael J Beran","doi":"10.1037/com0000373","DOIUrl":"10.1037/com0000373","url":null,"abstract":"<p><p>Delay of gratification and inhibitory control are generally considered measures of self-control. In humans, individual differences in measures of self-control are associated with a host of behavioral, neurological, cognitive, and health-related outcomes. Self-control is not unique to humans and has been demonstrated in a variety of nonhuman species using a variety of paradigms. In this study, the effect of sex and age on delay of gratification performance, as measured by the hybrid delay task, was tested in a sample of 88 chimpanzees. Additionally, whether individual differences in hybrid delay task performance were associated with different aspects of personality was examined in this study. Contrary to reports in human subjects, geriatric male chimpanzees were found to perform more efficiently than adult males, while no age differences were found between geriatric and adult females. Indeed, delay of gratification efficiency was positively associated with age in males and negatively associated with age in females. Chimpanzees that performed more efficiently on the hybrid delay task were also found to be rated as more intelligent, more extraverted, and less impulsive. These findings suggest that objective measures of efficiency in delay of gratification tasks are associated with different dimensions of personality, which have some overlapping construct validity. (PsycInfo Database Record (c) 2024 APA, all rights reserved).</p>","PeriodicalId":54861,"journal":{"name":"Journal of Comparative Psychology","volume":" ","pages":"203-210"},"PeriodicalIF":1.1,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139974688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Visual and acoustic exploratory behaviors toward novel stimuli in Antillean manatees (Trichechus manatus manatus) under human care. 人类照料下的安的列斯海牛(Trichechus manatus manatus)对新刺激的视觉和听觉探索行为。
IF 1.4 4区 心理学
Journal of Comparative Psychology Pub Date : 2024-05-01 Epub Date: 2023-12-14 DOI: 10.1037/com0000360
Aviva Charles, Yann Henaut, Michel Saint-Jalme, Baptiste Mulot, Alexis Lecu, Fabienne Delfour
{"title":"Visual and acoustic exploratory behaviors toward novel stimuli in Antillean manatees (Trichechus manatus manatus) under human care.","authors":"Aviva Charles, Yann Henaut, Michel Saint-Jalme, Baptiste Mulot, Alexis Lecu, Fabienne Delfour","doi":"10.1037/com0000360","DOIUrl":"10.1037/com0000360","url":null,"abstract":"<p><p>Exploratory behaviors describe the actions performed by an animal to obtain information on an object, environment, or individual by using its different senses. Exploration is described in some marine mammals, but not yet in manatees. Our study investigated behavioral and acoustic responses of two groups of Antillean manatees (<i>N</i> = 12 and <i>N</i> = 4) housed in zoological parks toward various stimuli involving three sensory modalities: visual, tactile, and auditory. Simultaneous audio and video recordings were collected during three periods of time (i.e., before, during, and after the presentation of all stimuli). Behaviors related to interest, social behaviors, the number and type of calls produced, and their frequency and duration were recorded and analyzed. Manatees reacted more to submerged stimuli than to out-of-water and sound stimuli, with an increase in approach, social contacts, and number of vocalizations. The proportion of squeaks and squeals call types also varied according to stimuli, and call entropy and F0 range varied according to periods. Our results suggest that manatees display sensory preferences when exploring stimuli, with more interest in manipulable stimuli, supporting the importance of their somatic perception. We highlight the need for particular enrichment programs (i.e., involving submerged objects) in zoological facilities. By displaying social contacts and by producing vocalizations, manatees communicate information such as their motivational state. The increase in call rate, harsh calls, and entropy values could be valid indicators of heightened arousal. We encourage further studies to associate acoustic recordings with ethological data collection to increase the understanding of manatees' behaviors andperception. (PsycInfo Database Record (c) 2024 APA, all rights reserved).</p>","PeriodicalId":54861,"journal":{"name":"Journal of Comparative Psychology","volume":" ","pages":"118-129"},"PeriodicalIF":1.4,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138813215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Humans' (Homo sapiens), capuchin monkeys' (Sapajus [Cebus] apella), and rhesus macaques' (Macaca mulatta) size judgments shift when stimuli change in frequency. 当刺激频率发生变化时,人类(智人)、卷尾猴(Sapajus[Cebus]apella)和恒河猴(Macaca mulatta)对体型的判断会发生变化。
IF 1.4 4区 心理学
Journal of Comparative Psychology Pub Date : 2024-05-01 Epub Date: 2023-10-23 DOI: 10.1037/com0000365
Sierra M V Simmons, Sarah F Brosnan
{"title":"Humans' (Homo sapiens), capuchin monkeys' (Sapajus [Cebus] apella), and rhesus macaques' (Macaca mulatta) size judgments shift when stimuli change in frequency.","authors":"Sierra M V Simmons, Sarah F Brosnan","doi":"10.1037/com0000365","DOIUrl":"10.1037/com0000365","url":null,"abstract":"<p><p>When making decisions, humans often strive to uphold objective, absolute standards, such as about what is small versus large, blue versus purple, or unfair versus fair, suggesting that our judgments should not be swayed by extraneous factors such as the sequence or frequency of events to be judged. Yet in previous research, when some items (e.g., threatening faces) became less frequent, humans responded by expanding their concept (of \"threatening\") to include more ambiguous stimuli. We assessed the origins of this perceptual frequency bias by testing 25 capuchins, seven rhesus monkeys, and 102 humans on a computer task in which they had to classify one circle at a time (pulled from a continuum of 50 circle sizes) as either small or large. Small and large circles initially appeared with equal probability but over time small circles either became less frequent, more frequent, or did not change in frequency. All three species showed changes in judgment, but contrary to predictions, they contracted, rather than expanded, their size judgments of the less frequent category. In other words, when small circles became rare, participants were more likely to judge ambiguous circles sizes as large (and vice versa). This may have been due to the immediate explicit feedback, as has recently been found in humans, and we consider possible mechanisms driving our participants' responses. These results suggest that humans' difficulties in maintaining absolute standards are shared with other animals. (PsycInfo Database Record (c) 2024 APA, all rights reserved).</p>","PeriodicalId":54861,"journal":{"name":"Journal of Comparative Psychology","volume":" ","pages":"99-107"},"PeriodicalIF":1.4,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49694100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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