​Approximately ____ of American households have difficulty at some point in providing adequate food for all family members

​As Florence gets older, passing her 50s and 60s, she finds that she has become more patient, less emotional, and finds it easier to deal with the challenges of life. At the same time, she is acutely aware that her physical functioning has declined, her eyesight is becoming problematic, and she now requires the use of a hearing aid. Florence’s various changes demonstrate Baltes’s feature of

​Which of the following values indicates the strongest relationship between two variables as measured by a correlation coefficient?

​Larry and Ira are brothers who are two years apart in age. Larry went to one public school for his grade school years, but before Ira could go to that school the district underwent a rezoning. Ira, therefore, ended up going to a different school with less-qualified teachers and fewer resources. As a result, Larry tended to perform much better in school than Ira did. This example demonstrates the influence of

​A memory for some significant life event is called a(n) ____ memory.

​Only a single sperm cell can successfully make the journey up a woman’s Fallopian tube to an unfertilized egg.

​By the age of ____ years, most youngsters can apply the basic principles of counting to as many as nine objects, even though they may still make some mistakes.

​Peter is doing a study where psychology students are asked how confident they are that they will do well on an exam immediately before taking that test. Peter seems to be assessing the ____ of the students.

​The life-span perspective in human development maintains the position that most of our development is complete by the time we finish our adolescent years.

​Dennis is sitting on a train and is looking at the mountains in the distance. He suddenly becomes aware that the trees and signs that are very close to the tracks look as if they are moving by far more rapidly than the mountains that are several miles away. Those mountains look as if they are just crawling by. Dennis is currently using ____ to determine the distance of what he is seeing.