Evaluating activity and emotional reactivity in a hexagonal tunnel maze: Correlational and factorial analysis from a study with the Roman/Verh rat lines

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Abstract

Two hundred forty 30-day-old Roman high- and low-avoidance (RHA/Verh and RLA/Verh) rats (divided equally by line and gender) which had received several peri- and/or postnatal treatments, forming two factorial [line x sex x treatment(s)] experimental designs, were tested in a hexagonal tunnel maze including a brightly illuminated central arena. The present study reports the results of correlational and factorial (principal-components) analyses performed on the data from those two experimental constituencies. The purpose of the study was to evaluate the validity of the hexagonal tunnel maze for testing emotionality, and therefore, the following measures were included in the analysis: entries into the central illuminated arena, total activity during testing, defecation during testing, and defecation during handling and weighing after testing. An overall pattern of negative correlations (or opposite loadings in the principal-components analyses) between defecation (especially during maze testing) and entries into the illuminated center and activity was found, thus giving support to the validity of entries into the illuminated center as being indicative of emotional reactivity. © 1994 Plenum Publishing Corporation.
Original languageEnglish
Pages (from-to)-425
JournalBehavior Genetics
Volume24
DOIs
Publication statusPublished - 1 Sep 1994

Keywords

  • Roman high- and low-avoidance rats
  • correlational analysis
  • emotionality
  • factor analysis
  • tunnel maze

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