A tragic train crash in Sweden in the 1800s led to what psychophysical finding?
a. Swedish rail employees were 0.8 seconds apart in their perception of railway signals.
b. A correction factor between two observers, called the personal equation, could improve operation of railway signals and reduce train crashes.
c. Nearly 5% of Swedish rail employees were color blind.
d. The development and use of the chronograph increased reliability of rail employees’ observations and signal operation.
C
You might also like to view...
According to arousal theory, which of the following statements is FALSE?
a. An individual becomes uncomfortable when arousal is too low or too high. b. The right mix of activities prevents boredom and overstimulation. c. The arousal theory explains the activation of our learned needs for achievement and power. d. Most adults vary their activities to keep arousal at a comfortable level of activation.
The most commonly prescribed antianxiety drugs are the
a. lithium salts. b. benzodiazepines. c. phenothiazines. d. tricyclics. e. monoamine oxidase inhibitors.
Who is most likely to influence children's athletic attitudes and capabilities?
A) peers B) parents C) coaches D) teachers
Vaginal stimulation results in endorphin production, and this probably evolved to ______.
A. increase a mother's bonding with her baby B. decrease pain during childbirth C. decrease pain during urination D. modify phantom pain during intercourse