The detour task, where an individual has to go around a see-through barrier in order to reach a goal, is one of the oldest paradigms used in animal cognition research (Kabadayi et al. 2018). While these previous tests have documented variation in the ability of animals to inhibit going straight for the visible reward, the cognitive underpinnings of this behaviour are as yet not fully understood. In the current study, Dewulf et al. (2025) assessed one of the specific cognitive processes that might be involved in this behaviour, the ability to identify the transparent object as a barrier. Through experimental procedures relying on large samples of individuals from four bird species, they compared the role of signal detection in inhibitory response performance in a detour task. The authors found that, unlike suggested in previous work with these four species (Regolin et al. 1994, Zucca et al. 2005), changing the markings on the barriers to potentially better match those experienced by individuals in their natural environments did not improve their performance. Nevertheless, the detailed further explorations suggest that in order to understand variation in how quickly individuals and species solve the detour task, it is important to consider that different cognitive processes are involved. Their work therefore provides a basis to better understand and further investigate why species might differ in their performance in the detour task.

 

The Stage 2 manuscript was evaluated over two rounds of in-depth review, the first round consisting of detailed comments from two reviewers and the second round consisting of a close read by the recommender. Based on detailed responses to the reviewers' comments, the recommender judged that the manuscript met the Stage 2 criteria and awarded a positive recommendation.

 

Level of bias control achieved: Level 6. No part of the data or evidence that was used to answer the research question was generated until after IPA.

 

URL to the preregistered Stage 1 protocol: https://osf.io/qvxgh
 
List of eligible PCI RR-friendly journals:
 

 

 

1. Dewulf, A., Garcia-Co, C., Müller, W., Madden, J.R., Martel, A., Lens, L. & Verbruggen, F. (2025). Do Ecological Valid Stop Signals Aid Detour Performance? A Comparison of Four Bird Species [Stage 2]. Acceptance of Version 3 by Peer Community in Registered Reports. https://osf.io/j2k9h
 

2. Kabadayi, C., Bobrowicz, K., & Osvath, M. (2018). The detour paradigm in animal cognition. Animal Cognition, 21, 21-35. https://doi.org/10.1007/s10071-017-1152-0

 

3. Regolin, L., Vallortigara, G., & Zanforlin, M. (1995). Object and spatial representations in detour problems by chicks. Animal Behaviour, 49, 195-199. https://doi.org/10.1016/0003-3472(95)80167-7

 

4. Zucca, P., Antonelli, F., & Vallortigara, G. (2005). Detour behaviour in three species of birds: quails (Coturnix sp.), herring gulls (Larus cachinnans) and canaries (Serinus canaria). Animal Cognition, 8, 122-128. https://doi.org/10.1007/s10071-004-0243-x

The detour task, where an individual has to navigate around a see-through barrier in order to reach a goal, is one of the oldest paradigms used in animal cognition research (Kabadayi et al. 2018). While these previous tests have documented variation in the ability of animals to inhibit going straight for the visible but blocked reward, the cognitive underpinnings of this behaviour are as yet not fully understood. In the current study, Dewulf et al. (2023) propose to assess one of the specific cognitive processes that might be involved in this behaviour. Through experimental procedures, they will compare the role of signal detection in inhibitory response performance in a detour task. To assess whether variation in detection of the barrier might be linked to the ecological niche of a species, they will compare four bird species who live in different environments. Individuals from these four species were previously tested in a detour task (Regolin et al. 1994, Zucca et al. 2005), and the proposed research plan therefore also involves a partial replication of previous studies on the same issue, but improving some critical aspects.

 

The Stage 1 manuscript was evaluated over one round of in-depth review. Based on detailed responses to the reviewers' comments, the recommender judged that the manuscript met the Stage 1 criteria and therefore awarded in-principle acceptance (IPA).

 

Level of bias control achieved: Level 6. No part of the data or evidence that will be used to answer the research question yet exists and no part will be generated until after IPA. 

 

 

 

• Experimental Psychology
• Journal of Cognition
• Peer Community Journal
• PeerJ
• Royal Society Open Science

 

 

Dewulf, A., Garcia-Co, C., Müller, W., Madden, J.R., Martel, A., Lens, L. & Verbruggen, F. (2023). Do Ecological Valid Stop Signals Aid Detour Performance? A Comparison of Four Bird Species. In principle acceptance of Version 2 by Peer Community in Registered Reports. https://osf.io/qvxgh

 

Kabadayi, C., Bobrowicz, K., & Osvath, M. (2018). The detour paradigm in animal cognition. Animal Cognition, 21, 21-35. https://doi.org/10.1007/s10071-017-1152-0

 

Regolin L, G Vallortigara, and M Zanforlin (1994). Perceptual and motivational aspects of detour behaviour in young chicks. Animal Behaviour 47, 123–131. https://doi.org/https://doi.org/10.1006/anbe.1994.1014

 

Zucca P, F Antonelli, and G Vallortigara (2005). Detour behaviour in three species of birds: quails (Coturnix sp.), herring gulls (Larus cachinnans) and canaries (Serinus canaria). Animal Cognition, 8, 122–128. https://doi.org/10.1007/s10071-004-0243-x