National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Repeatability and personality in tests of exploratory behaviour
Žampachová, Barbora ; Frynta, Daniel (advisor) ; Sedláček, František (referee)
Personality, or behavioural differences among individuals, which are stable both in time and across contexts, is a highly popular topic. Currently there has been an increase of interest in the relationship between personality and repeatability, which is a methodical approach developed to measure the stability of interindividual differences in time. The aim of this thesis is to evaluate the personality of rats according to behavioural patterns exhibited under widely used testing procedures in new environment (open field test, hole board test) and to compare, how behavioural traits in these tests mutually correlate and change over time. Each test trial was repeated eight times with different intervals (24 hours, 6 days, 4 weeks). The results suggest that most of the recorded behavioural variability can be explained with three principal axes. The first one is associated with loco-exploratory activity of the subject. The elements of behaviour associated with this axis are the most repeatable. The second axis is mostly associated with time the animal spent in the central part of the arena and the third axis represents the interest in holes in hole board test. These two axes are less repeatable. A significant effect of the identity of the animal was found in all behavioural traits, associated with these...
Repeatability of behavioural measures of personality
Žampachová, Barbora ; Frynta, Daniel (advisor) ; Adamová, Dana (referee)
Personality is a concept enabling us to describe the systematical individual differences in behavior. It includes many behaviors, like exploration, activity, aggression, reaction to new stimuli, or sociability. The individuals differing in their exploration strategy are called fast and slow explorers, those differing in the level of aggression and the reaction to stress are called proactive and reactive individuals. If a certain group of behaviors appears together, we talk about behavioral syndromes. There are many definitions of personality, but most of them share a demand for time consistency. Repeatability is one of the tools for measuring this consistency. It's a correlation among repeated measures of the same individual. It is counted either as Spearman's or Pearson's correlation, or as an intraclass correlation coefficient, using variance components acquired from ANOVA, GLMM, or LMM. My original assumption was that the most repeatable behaviors are the ones demanding an immediate answer to the current situation. I executed a meta-analysis of the repeatability of behavior to test this hypothesis. I found the highest repeatability in aggression and the lowest in exploration. Other important factors were the identity of the source study, number of repeats, number of tested animals, and the method of...

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