I. B. Laumer
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View article: Wild and zoo-housed orangutans differ in how they explore objects
Wild and zoo-housed orangutans differ in how they explore objects Open
In human infants, exploratory object manipulations (henceforth called “EOM”) stimulate cognitive development and affect cognitive performance in later life. Zoo-housed great apes are frequently used to study the evolution of human cognitio…
View article: Wild and zoo-housed orangutans differ in how they explore objects
Wild and zoo-housed orangutans differ in how they explore objects Open
In human infants, exploratory object manipulations (henceforth called “EOM”) stimulate cognitive development and affect cognitive performance in later life. Zoo-housed great apes are frequently used to study the evolution of human cognitio…
View article: Correction: Individual Goffin´s cockatoos (Cacatua goffiniana) show flexible targeted helping in a tool transfer task
Correction: Individual Goffin´s cockatoos (Cacatua goffiniana) show flexible targeted helping in a tool transfer task Open
[This corrects the article DOI: 10.1371/journal.pone.0253416.].
View article: Active self-treatment of a facial wound with a biologically active plant by a male Sumatran orangutan
Active self-treatment of a facial wound with a biologically active plant by a male Sumatran orangutan Open
Although self-medication in non-human animals is often difficult to document systematically due to the difficulty of predicting its occurrence, there is widespread evidence of such behaviors as whole leaf swallowing, bitter pith chewing, a…
View article: Spontaneous playful teasing in four great ape species
Spontaneous playful teasing in four great ape species Open
Joking draws on complex cognitive abilities: understanding social norms, theory of mind, anticipating others' responses and appreciating the violation of others’ expectations. Playful teasing, which is present in preverbal infants, shares …
View article: Data_Laumer et al. from Spontaneous playful teasing in four great ape species
Data_Laumer et al. from Spontaneous playful teasing in four great ape species Open
Joking draws on complex cognitive abilities: understanding social norms, theory of mind, anticipating others' responses, and appreciating the violation of others’ expectations. Playful teasing, which is present in preverbal infants, shares…
View article: Ecological, social, and intrinsic factors affecting wild orangutans’ curiosity, assessed using a field experiment
Ecological, social, and intrinsic factors affecting wild orangutans’ curiosity, assessed using a field experiment Open
The readiness to interact with and explore novel stimuli—i.e., curiosity—is the cornerstone of innovation. Great apes show broad and complex innovation repertoires. However, little is known about the factors that affect curiosity in wild a…
View article: Curiosity in wild orangutans: ecological, social, and intrinsic effects assessed during a field experiment
Curiosity in wild orangutans: ecological, social, and intrinsic effects assessed during a field experiment Open
The readiness to interact with, and explore, novel stimuli – i.e., curiosity – are cornerstones of innovation. Great apes show the broadest and most complex innovation repertoires. However, little is known about the factors that affect cur…
View article: Individual Goffin´s cockatoos (Cacatua goffiniana) show flexible targeted helping in a tool transfer task
Individual Goffin´s cockatoos (Cacatua goffiniana) show flexible targeted helping in a tool transfer task Open
Flexible targeted helping is considered an advanced form of prosocial behavior in hominoids, as it requires the actor to assess different situations that a conspecific may be in, and to subsequently flexibly satisfy different needs of that…
View article: Orangutans (Pongo abelii) make flexible decisions relative to reward quality and tool functionality in a multi-dimensional tool-use task
Orangutans (Pongo abelii) make flexible decisions relative to reward quality and tool functionality in a multi-dimensional tool-use task Open
Making economic decisions in a natural foraging situation that involves the use of tools may require an animal to consider more levels of relational complexity than merely deciding between an immediate and a delayed food option. We used th…
View article: Spontaneous innovation of hook-bending and unbending in orangutans (Pongo abelii)
Spontaneous innovation of hook-bending and unbending in orangutans (Pongo abelii) Open
Betty the crow astonished the scientific world as she spontaneously crafted hook-tools from straight wire in order to lift a basket out of vertical tubes. Recently it was suggested that this species’ solution was strongly influenced by pre…
View article: Can hook-bending be let off the hook? Bending/unbending of pliant tools by cockatoos
Can hook-bending be let off the hook? Bending/unbending of pliant tools by cockatoos Open
The spontaneous crafting of hook-tools from bendable material to lift a basket out of a vertical tube in corvids has widely been used as one of the prime examples of animal tool innovation. However, it was recently suggested that the anima…
View article: Dataset Laumer et al. 2017 from Can hook-bending be let off the hook? Bending/unbending of pliant tools by cockatoos
Dataset Laumer et al. 2017 from Can hook-bending be let off the hook? Bending/unbending of pliant tools by cockatoos Open
The spontaneous crafting of hook-tools from bendable material to lift a basket out of a vertical tube in corvids has widely been used as one of the prime examples of animal tool innovation. However, it was recently suggested that the anima…
View article: Supplementary material from "Can hook-bending be let off the hook? Bending/unbending of pliant tools by cockatoos"
Supplementary material from "Can hook-bending be let off the hook? Bending/unbending of pliant tools by cockatoos" Open
The spontaneous crafting of hook-tools from bendable material to lift a basket out of a vertical tube in corvids has widely been used as one of the prime examples of animal tool innovation. However, it was recently suggested that the anima…
View article: Goffin's cockatoos make the same tool type from different materials
Goffin's cockatoos make the same tool type from different materials Open
Innovative tool manufacture is rare and hard to isolate in animals. We show that an Indonesian generalist parrot, the Goffin's cockatoo, can flexibly and spontaneously transfer the manufacture of stick-type tools across three different mat…
View article: Flexible decision-making relative to reward quality and tool functionality in Goffin cockatoos (Cacatua goffiniana)
Flexible decision-making relative to reward quality and tool functionality in Goffin cockatoos (Cacatua goffiniana) Open
Decisions involving the use of tools may require an agent to consider more levels of relational complexity than merely deciding between an immediate and a delayed option. Using a new experimental approach featuring two different types of t…
View article: Supplementary data from Goffin's cockatoos make the same tool type from different materials
Supplementary data from Goffin's cockatoos make the same tool type from different materials Open
This excel file contains raw data of the experiment