&lt;Review&gt; Acquisition of Skilled Gathering Techniques in Mahale Chimpanzees

Byrne, Richard W.; Corp, Nadia

doi:10.5134/143423

Cited by 4 publications

(3 citation statements)

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“…This effect is difficult to interpret because it is proposed to be related to the smaller sample size with bouts than frequency, as significant biases are more likely to appear with large than small samples (Hopkins 2006;Hopkins et al 2001McGrew and Marchant 1997) (hypothesis tested and discussed in Chapelain and Hogervorst 2009). Our finding of strong laterality for bimanual manipulative coordination in bonobos is consistent with previous data on bimanual coordinated actions in bonobos and other species for the tube task and food-processing tasks (Byrne and Byrne 1991;Byrne and Corp 2003;Corp and Byrne 2004;Ingmanson 1998;Meguerditchian et al 2010). This supports hypotheses proposing that complex tasks that are crucial for survival, such as food processing that involves bimanual coordination, manipulation and precise actions, elicit laterality; and suggests that these actions may have been selective pressures for the emergence of handedness.…”

Section: Discussionsupporting

confidence: 90%

“…In addition to these external factors, sex and age should also be taken into account because they may influence laterality. For instance, several studies have found that males were more left-handed than females (e.g., Byrne and Corp 2003;Corp and Byrne 2004;Milliken et al 1991). Other studies have found that immature individuals exhibited weaker or less consistent preferences than adults, which indicates that laterality may increase with age, suggesting some maturation of hand preferences (e.g., Boesch 1991;Fletcher and Weghorst 2005;Hook and Rogers 2000;Hopkins 1994Hopkins , 1995Humle and Matsuzawa 2009;Milliken et al 1991;Vauclair and Fagot 1987;Suomi 1993, 1994).…”

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confidence: 95%

“…Task complexity is thus an important factor to consider when assessing hand preferences. Among complex tasks that are thought to be appropriate measures, bimanual manipulative coordinated actions with different but complementary roles (one hand manipulates an item that is held by the other hand) elicit particularly strong laterality (Byrne and Corp 2003;Hopkins 2006;Rogers and Kaplan 1996). Bimanual tasks are also less vulnerable to the influence of postural and situational factors (e.g., position of the object, Seltzer et al 1990;Vauclair and Fagot 1987), so hand preferences in such tasks are more likely to reflect brain lateralization (Hopkins 1994(Hopkins , 2006).…”

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Hand Preferences for Bimanual Coordination in 77 Bonobos (Pan paniscus): Replication and Extension

et al. 2011

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The literature on manual laterality in nonhuman primates provides inconsistent and inconclusive findings and is plagued by methodological issues (e.g., small samples, inconsistency in methods, inappropriate measures) and gaps. Few data are available on bonobos and these are only from small samples and for relatively simple tasks. We examined laterality in a large sample of bonobos for a complex task. We tested 48 bonobos from Lola Ya Bonobo sanctuary (DR Congo) in an extension of our previous study of 29 bonobos from 3 European zoos. We assessed hand preferences using the tube task, which involves bimanual coordination: one hand extracts food from a tube that is held by the other hand. This task is a good measure of laterality and it has been used in other studies. We recorded events (frequency) and independent bouts of food extraction. We found significant manual laterality, which was not influenced by the settings or rearing history. We observed little effect of sex and found an influence of age, with greater right hand use in adults. The laterality was marked, with strong preferences and most individuals being lateralized (when analyzing frequency). We found individual preferences, with no group-level bias, even when we combined the data from the sanctuary and the zoos to enlarge the sample to 77. These first data, for a complex task and based on a large sample, are consistent with previous findings in Int bonobos and in other nonhuman primate species for a variety of tasks. They suggest that, despite particular features in terms of proximity to humans, language and bipedalism, bonobos do not display a laterality that is more marked or more similar to human handedness compared to that of other nonhuman primate species.

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Hand Preferences for Bimanual Coordination in 77 Bonobos (Pan paniscus): Replication and Extension

et al. 2011

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Hand preference and its flexibility according to the position of the object: a study in cercopithecines examining spontaneous behaviour and an experimental task (the Bishop QHP task)

et al. 2012

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The extant literature on manual laterality in non-human primates is inconclusive, plagued by inconsistent or contradictory findings and by disturbing methodological issues (e.g. uncontrolled influential factors, comparability issues). The present study examined hand preference and its flexibility in 15 red-capped mangabeys (C. t. torquatus) and 13 Campbell's monkeys (C. c. campbelli), two species that differ in their degree of arboreality. We investigated the influence of the spatial position of the object on hand preference for reaching. We considered spontaneous behaviour (reaching for food during daily feeding) and an experimental task: the QHP task. The QHP is a task that is used in humans. This is a simple reaching task that involves high spatial constraints on hand use. In our study, the subject had to reach for items that were placed on a semi-circle in front of it on five positions, including in the centre position, in the ipsilateral space and in the contralateral space. We assessed hand preference for reaching in front (baseline condition), and we examined how this preference changed when reaching in lateral positions. For reaching in front, about half of the subjects were lateralized and no group-level bias occurred, for both spontaneous and experimental conditions. When considering reaching in the lateral positions, we observed that the position of the object influenced hand use: individuals used the hand that was closest to the object. The results are discussed in relation to previous findings in humans and in non-human primates and regarding theories on handedness and flexibility of hand preference.

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Hand preferences for bimanual coordination in 29 bonobos (Pan paniscus)

Chapelain

Hogervorst

2009

Behavioural Brain Research

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<Review> Acquisition of Skilled Gathering Techniques in Mahale Chimpanzees

Cited by 4 publications

References 8 publications

Hand Preferences for Bimanual Coordination in 77 Bonobos (Pan paniscus): Replication and Extension

Hand Preferences for Bimanual Coordination in 77 Bonobos (Pan paniscus): Replication and Extension

Hand preference and its flexibility according to the position of the object: a study in cercopithecines examining spontaneous behaviour and an experimental task (the Bishop QHP task)

Hand preferences for bimanual coordination in 29 bonobos (Pan paniscus)

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