The psychological and cardiovascular influence of a friendly, unfamili
ar dog on a group of 17 male students was compared to a group of men (
19) who did not have access to the dog, during a stressor Blood pressu
re and heart rate were measured during 4 test conditions (rest, prepar
ation, speech task, recovery). State-anxiety was measured before and a
fter the preparation and speech task. Subjects from the experimental g
roup(E) but not from the control group(C) interacted with a dog during
the preparation and speech tasks. The preparation and speech tasks ca
used statistically significant increases in cardiovascular parameters
(blood pressure, heart rate) (F ((12,22)) = 17.60; p = 0.000), and sta
te-anxiety (E-group: (x) over bar(sta1) = 29.8; (x) over bar(sta2) = 4
7.9; t = -6.12; df = 16; p = 0.000, C-group: (x) over bar(sta1) = 31.4
; (x) over bar(sta2) = 47,0; t = -5.68; df = 18; p = 0.000). No signif
icant differences were found between the control and the experimental
group with regard to state-anxiety anxiety ((x) over bar(c) = 15.6, (x
) over bar(e) = -18.2; t = 0.63; df = 34; p = 0.533), blood pressure a
nd heart rate (F-(4,F-30) = 1.18; p = 0.038), even after controlling f
or the effects of daily stress (F-(4,F-29) = 1.427; p = 0.250). It is
concluded that a friendly but unfamiliar dog has no significant psycho
logical or cardiovascular effect on male students during a speech task
in a laboratory setting. Possibly the stress of the speech task and t
he laboratory setting overrided the influence of the pet.