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Considerable research into the role of the stockperson's attitude and behaviour on the behaviour, productivity and welfare of commercial pigs has been conducted. Recently, it has been demonstrated that a training program to modify the attitudes and behaviour of stockpeople on small and moderately sized commercial farms results in improvements in these variables and these improvements, in turn, lead to a reduction of fear in pigs and an improvement in reproductive performance. The aim of this study was to determine whether a similar training procedure would be effective in modifying stockperson behaviour at a large commercial farm in which the effects of peer pressure and the consequent increased homogeneity of stockperson behaviour may influence the effectiveness of the training programme. In addition, the effects of these modification procedures on other, job-related variables were investigated. A total …