Due to nonparametric data, consistency in behavioural responses within individuals and relationships between production traits and personality traits were investigated with Spearman rank-order correlations. However, figures in this thesis are present raw data.

Factors other than personality that could possibly influence cow behaviour were tested for by Kruskal-Wallis tests (current lactation, month of pregnancy and months since last calving).

All statistical analyses were conducted in SPSS.