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PeerJ. 2015 Jun 18;3:e908. doi: 10.7717/peerj.908. eCollection 2015.

A new perspective on how humans assess their surroundings; derivation of head orientation and its role in 'framing' the environment.

PeerJ

Gwendoline Ixia Wilson, Mark D Holton, James Walker, Mark W Jones, Ed Grundy, Ian M Davies, David Clarke, Adrian Luckman, Nick Russill, Vianney Wilson, Rosie Plummer, Rory P Wilson

Affiliations

  1. Swansea Lab for Animal Movement, Biosciences, College of Science, Swansea University , Singleton Park, Swansea, Wales , UK.
  2. College of Engineering, Swansea University , Singleton Park, Swansea, Wales , UK.
  3. Computer Science, College of Science, Swansea University , Singleton Park, Swansea, Wales , UK.
  4. Department of Mathematics, College of Science, Swansea University , Singleton Park, Swansea, Wales , UK.
  5. Department of Geography, College of Science, Swansea University , Singleton Park, Swansea, Wales , UK.
  6. TerraDat , Cardiff, Wales , UK.
  7. National Botanic Garden of Wales , Llanarthne, Camarthen, Wales , UK.

PMID: 26157643 PMCID: PMC4476166 DOI: 10.7717/peerj.908

Abstract

Understanding the way humans inform themselves about their environment is pivotal in helping explain our susceptibility to stimuli and how this modulates behaviour and movement patterns. We present a new device, the Human Interfaced Personal Observation Platform (HIPOP), which is a head-mounted (typically on a hat) unit that logs magnetometry and accelerometry data at high rates and, following appropriate calibration, can be used to determine the heading and pitch of the wearer's head. We used this device on participants visiting a botanical garden and noted that although head pitch ranged between -80° and 60°, 25% confidence limits were restricted to an arc of about 25° with a tendency for the head to be pitched down (mean head pitch ranged between -43° and 0°). Mean rates of change of head pitch varied between -0.00187°/0.1 s and 0.00187°/0.1 s, markedly slower than rates of change of head heading which varied between -0.3141°/0.1 s and 0.01263°/0.1 s although frequency distributions of both parameters showed them to be symmetrical and monomodal. Overall, there was considerable variation in both head pitch and head heading, which highlighted the role that head orientation might play in exposing people to certain features of the environment. Thus, when used in tandem with accurate position-determining systems, the HIPOP can be used to determine how the head is orientated relative to gravity and geographic North and in relation to geographic position, presenting data on how the environment is being 'framed' by people in relation to environmental content.

Keywords: Environmental framing; Head attitude; Navigation behaviour

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