Human Reflexes and Response Times Auditory and Visual Cues.
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Transcript of Human Reflexes and Response Times Auditory and Visual Cues.
Human Reflexes and Response Times
Auditory and Visual Cues
Reflex
• Any response that occurs
automatically without
conscious effort.
• Two Types:
– Simple or basic: built –in,
unlearned responses.
– Acquired or conditioned: result
of practice and learning.
Reflex Arc:
Stimulus ReceptorIntegration
Center
EffectorsResponse
Afferent pathway CNS
Sensory neurons
Efferent pathway
Motor neurons
Muscle or gland
Reflex is predictable because the pathway
between the receptor and effector is always the same.
Receptor Afferen
t pathway
Reaction Times
• College age men:
– 190 ms auditory
– 160 ms visual
• Why ?
– Auditory stimulus takes 8-10 ms to
reach brain. Visual takes 20-40 msec.
Factors Influencing Reaction Time
• Stimulus Strength
• Arousal
• Age
• Gender
• Direct vs.
Peripheral Vision
• Fatigue
• Alcohol
• Distractions
• Breathing Cycle
• Intelligence
Today’s lab
• Lab should be done by EACH
member of the group as a subject.
• We will not compare class values, so
ignore that part in labscribe
questions.
• Just compare within your own group.
Homework• Answer ALL questions
from labscribe
assignment.
• Write a methods section
for a scientific paper. Do
NOT copy word for word
from labscribe. Write
them in your own words.
Methods
• Should describe what was done so
that someone who is not in this
class could repeat the experiment.
• Do not give grave detail regarding
the operation of labscribe.
• Include information regarding the
way data were collected and what
analyses of those data you did
(mean, standard error of the mean,
comparisons).