Table 1.

Correlation analysis of the relationship between angle of turn α and concentration β of the stimulus for all conditions tested

ApplicationSlope aIntercept brN
Single-point applications
    10-1 mol l-1 betaine19.7±0.70.8±1.90.999
    10-2 mol l-1 betaine16.9±0.71.5±1.70.999
    10-4 mol l-1 betaine16.3±0.2-1.1±0.60.999
    10-6 mol l-1 betaine15.7±0.40.2±0.90.999
    10-7 mol l-1 betaine14.6±0.5-3.2±1.20.999
    10-2 mol l-1 taurine-19.5±2.9-19.1±7.9-0.938
    Relationship between slope and [β]0.7±0.219.4±0.80.915
    Relationship between intercept and [β]0.6±0.31.9±1.20.775
Unilateral two-point applications
    10-2 mol l-1 betaine; orienting6.0±1.514.5±7.10.8310
    10-2 mol l-1 betaine; avoidance-8.4±1.415.5±6.9-0.8712
Bilateral two-point applications
    10-2 mol l-1 betaine9.3±1.67.3±4.20.919
Unilateral two-point applications angle correlations
    Third turn vs first turn1.0±0.2-3.7±8.20.8417
    Second turn vs first turn0.0±0.222.9±8.10.0817
Bilateral two-point applications angle correlations
    Third turn vs first turn0.6±0.334.5±17.40.5312
    Second turn vs first turn-0.4±0.4-40.4±21.7-0.3212
  • α=aβ+b, where α is the angle of turn andβ is the stimulus concentration. Values of slope a and intercept b are means ± s.e.m. N, sample size; r, correlation coefficient.

    The table also shows correlation analysis for first and second angles of turn for sequences of turns elicited by 1- and 2-point applications.