Dataset Information

Combining path integration and remembered landmarks when navigating without vision.

ABSTRACT: This study investigated the interaction between remembered landmark and path integration strategies for estimating current location when walking in an environment without vision. We asked whether observers navigating without vision only rely on path integration information to judge their location, or whether remembered landmarks also influence judgments. Participants estimated their location in a hallway after viewing a target (remembered landmark cue) and then walking blindfolded to the same or a conflicting location (path integration cue). We found that participants averaged remembered landmark and path integration information when they judged that both sources provided congruent information about location, which resulted in more precise estimates compared to estimates made with only path integration. In conclusion, humans integrate remembered landmarks and path integration in a gated fashion, dependent on the congruency of the information. Humans can flexibly combine information about remembered landmarks with path integration cues while navigating without visual information.

SUBMITTER: Kalia AA

PROVIDER: S-EPMC3764103 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature

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Combining path integration and remembered landmarks when navigating without vision.

Kalia Amy A AA Schrater Paul R PR Legge Gordon E GE

PloS one 20130905 9

This study investigated the interaction between remembered landmark and path integration strategies for estimating current location when walking in an environment without vision. We asked whether observers navigating without vision only rely on path integration information to judge their location, or whether remembered landmarks also influence judgments. Participants estimated their location in a hallway after viewing a target (remembered landmark cue) and then walking blindfolded to the same or ...[more]

PMID: 24039742

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Project description:IntroductionBariatric surgery, an established weight-loss tool, may be offered to some adolescents with severe obesity. However, few studies explore adolescents' postoperative experiences beyond physical and metabolic outcomes and quality-of-life measures.MethodsBetween 2016 and 2021, 45 semi-structured interviews were conducted with adolescents (16-20 years) at 6 months (N = 15), 12 months (N = 15), and 24 months (N = 15) following bariatric surgery. A deductive thematic analysis framework was applied by two independent coders (Cronbach's α = 0.84). Themes were identified and refined iteratively, and discrepancies were resolved through discussion.ResultsFive major themes emerged related to: (1) weight-loss expectations vs. reality, (2) social landscape, (3) body image, (4) eating and moving, and (5) challenges for long-term success. The pace of and satisfaction with weight loss and side effects was heterogenous among participants, with most changes occurring early and stabilizing by 24 months. Adolescents adapted over time to their new social landscapes (e.g., relationships) and reported improved body image and confidence, yet persistently struggled to reconcile their internal identity with evolving external perceptions and discomfort with new attention. Participants experienced changes to lifestyle routines after surgery (e.g., eating, moving, habits), which introduced distress at 6 months but resolved over time. Life transitions in early adulthood (e.g., moving away, university/college, employment), concurrent with their evolving and increasing autonomy, physical, social, and financial independence, imposed unexpected challenges to postoperative routines and support systems. Participants unanimously reaffirmed that bariatric surgery is a lifelong journey and that they were committed to long-term success.ConclusionOur findings provide insight into optimizing adolescent selection for bariatric surgery and perioperative support. Specifically, important life transitions during this developmental period impact postoperative experiences and outcomes and adolescents may benefit from postoperative counseling focused on managing weight-loss expectations and adapting to evolving nutritional needs and changing social circumstances.

Dataset Information

Combining path integration and remembered landmarks when navigating without vision.

Publications

Combining path integration and remembered landmarks when navigating without vision.

Similar Datasets

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