Table 4. Correlation (r) matrix of elite volleyball referees’ anxiety questionnaire responses in regards to the other measurements taken. State anxiety pre-match State anxiety post-match Trait anxiety HR pre-match -0.17 0.03 -0.05 HR post-match -0.29 0.00 -0.06 Ø HR during the match -0.23 0.14 -0.03 HRV pre-match 0.16 -0.27 -0.18 HRV post-match 0.07 -0.26 -0.17 Ø HRV during the match 0.12 -0.30 -0.26 Problematic single decisions -0.17 0.34 * 0.18 Fear of physical harm 0.07 0.15 0.17 Technical error -0.37 * 0.41 * 0.06 Social conflicts 0.00 0.07 -0.12 Observation pressure 0.15 0.08 0.15 BOSSS Total 0.05 0.21 0.24 * indicate p < 0.05.