In the 1970s,a Number of Studies Suggested That Over the Course

question 4

Multiple Choice

In the 1970s,a number of studies suggested that over the course of a long marriage,spouses' relationship satisfaction generally followed a U-shaped curve: first declining,then remaining stable,and then increasing (presumably after children left home) .In the 1990s,new research proved this idea wrong.Generally,marital satisfaction declines throughout the course of marriage.What was the difference between the earlier and the later research?

• A) The early research was correlational,and the later research was experimental.
• B) The early research suffered from attrition bias,and the later research did not.
• C) The early research examined only American couples,and the later research examined cross-cultural samples.
• D) The early research was cross-sectional,and the later research was longitudinal.

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Definitions:

Sporangia

Structures in fungi, algae, and plants where spores are formed and stored, playing a key role in reproduction and dispersal.

Sporophyte

The diploid multicellular stage in the life cycle of plants and algae, which produces spores through meiosis.

Mitosis

The stage of cellular reproduction in which nuclear division occurs; process in which a parent nucleus produces two daughter nuclei, each having the same number and kinds of chromosomes as the parent nucleus.

Psilotum

A genus of fern-like plants belonging to the whisk fern family (Psilotaceae), known for lacking true roots and leaves.