When a sparkler is twirled rapidly, people perceive a circle of light. This occurs because
A. the trail you see is caused by sparks left behind from the sparkler.
B. longer light wavelengths from the sparkler produce a visual echoic effect.
C. the length of iconic memory is about a fraction of a second.
D. Gestalt principles work to complete the circle in our minds.
Answer: C
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For a perfectly symmetrical distribution with a median of 30, what is the value of the mean?
a. 30 b. Greater than 30 c. Less than 30 d. Cannot be determined from the information given
The most famous delayed gratification task involves ______.
A. asking children to choose between a small piece of candy today or an entire bag of chips tomorrow B. asking children to choose between one marshmallow now or two marshmallows 15 min from now C. requiring children to wait 4 min to eat a cookie D. requiring children to finish a sandwich before playing with a desired toy
As many as ___________ percent of preschool age children have difficulty getting to and staying asleep
a. 20 to 30 c. 40 to 50 b. 30 to 40 d. 50 to 60
Traditionally, in which ethnic community do families tend to
be fairly strict with all aged children and tend to emphasize loyalty and interdependence among family members; respect for elders; and the development of a positive identity, self-reliance, resourcefulness, and the ability to take care of oneself in difficult situations? a. African-American b. Hispanic c. Asian-American d. European-American