Some people meet, fall in love and get married right away. Others can spend hours in the sock aisle at the department store, weighing the pros and cons of buying a pair of wool argyles instead of cotton striped.

Seeing the world as black and white, in which choices seem clear, or shades of gray can affect people's path in life, from jobs and relationships to which political candidate they vote for, researchers say. People who often have conflicting feelings about situations -- the shades-of-gray thinkers -- have more of what psychologists call ambivalence, while those who tend toward unequivocal views have less ambivalence.

High ambivalence may be useful in some situations, and low ambivalence in others, researchers say. And although people don't fall neatly into one camp or the other, in general, individuals who tend toward ambivalence do so fairly consistently across different areas of their lives.

For decades psychologists largely ignored ambivalence because they didn't think it was meaningful. The way researchers studied attitudes -- by asking participants where they fell on a scale ranging from positive to negative -- also made it difficult to tease apart who held conflicting opinions from those who were neutral, according to Mark Zanna, a University of Waterloo professor who studies ambivalence. (Similarly, psychologists long believed it wasn't necessary to examine men and women separately when studying the way people think.)

Now, researchers have been investigating how ambivalence, or lack of it, affects people's lives, and how they might be able to make better decisions. Overall, thinking in shades of gray is a sign of maturity, enabling people to see the world as it really is. It's a 'coming to grips with the complexity of the world,' says Jeff Larsen, a psychology professor who studies ambivalence at Texas Tech University in Lubbock.

In a recent study, college students were asked to write an essay coming down on one side or another of a contentious issue, regarding a new labor law affecting young adults, while other groups of students were allowed to write about both sides of the issue. The students forced to choose a side reported feeling more uncomfortable, even physically sweating more, says Frenk van Harreveld, a social psychologist at the University of Amsterdam who studies how people deal with ambivalence.

If there isn't an easy answer, ambivalent people, more than black-and-white thinkers, are likely to procrastinate and avoid making a choice, for instance about whether to take a new job, says Dr. Harreveld. But if after careful consideration an individual still can't decide, one's gut reaction may be the way to go. Dr. van Harreveld says in these situations he flips a coin, and if his immediate reaction when the coin lands on heads is negative, then he knows what he should do.

Researchers can't say for sure why some people tend towards greater ambivalence. Certain personality traits play a role -- people with a strong need to reach a conclusion in a given situation tend to black-and-white thinking, while ambivalent people tend to be more comfortable with uncertainty. Individuals who are raised in environments where their parents are ambivalent or unstable may grow to experience anxiety and ambivalence in future relationships, according to some developmental psychologists.

Culture may also play a role. In western cultures, simultaneouslyseeing both good and bad 'violates our world view, our need to put things in boxes,' says Dr. Larsen. But in eastern philosophies, it may be less problematic because there is a recognition of dualism, that something can be one thing as well as another.

One of the most widely studied aspects of ambivalence is how it affects thinking. Because of their stronglypositive or stronglynegative views, black-and-white thinkers tend to be quicker at making decisions than highly ambivalent people. But if they get mired in one point of view and can't see others, black-and-white thinking may promptconflict with others or unhealthy thoughts or behaviors.

People with clinical depression, for instance, often get mired in a negative view of the world. They may interpret a neutral action like a friend not waving to them as meaning that their friend is mad at them, and have trouble thinking about alternative explanations.

Ambivalent people, on the other hand, tend to systematically evaluate all sides of an argument before coming to a decision. They scrutinize carefully the evidence that is presented to them, making lists of pros and cons, and rejecting overly simplified information.

Ambivalent individuals' ability to see all sides of an argument and feel mixed emotions appears to have some benefits. They may be better able to empathize with others' points of view, for one thing. And when people are able to feel mixed emotions, such as hope and sadness, they tend to have healthier coping strategies, such as when a spouse passes away, according to Dr. Larsen. They may also be more creative because the different emotions lead them to consider different ideas that they might otherwise have dismissed.

People waffling over a decision may benefit from paring down the number of details they are weighing and instead selecting one or a few important values to use in basing their decision, says Richard Boyatzis, a professor in organizational behavior, psychology and cognitive science at Case Western Reserve University.

Shirley S. Wang

• affect [ə´fekt] vt.影响；感动；假装 (初中英语单词)
• candidate [´kændideit] n.候选人；投考者 (初中英语单词)
• instance [´instəns] n.例子，实例，例证 (初中英语单词)
• consideration [kən,sidə´reiʃən] n.考虑；原因；体谅 (初中英语单词)
• reaction [ri´ækʃən] n.反应(力) (初中英语单词)
• personality [,pə:sə´næliti] n.人；个性；人品；人物 (初中英语单词)
• conclusion [kən´klu:ʒən] n.结束；结论；推论 (初中英语单词)
• anxiety [æŋ´zaiəti] n.挂念；渴望；焦虑的事 (初中英语单词)
• western [´westən] a.西的；西方的 (初中英语单词)
• recognition [,rekəg´niʃən] n.认出；认识；承认 (初中英语单词)
• strongly [´strɔŋli] ad.强烈地；强有力地 (初中英语单词)
• conflict [´kɔnflikt, kən´flikt] n.&vi.战斗；抵触 (初中英语单词)
• depression [di´preʃən] n.沮丧，抑郁；萧条 (初中英语单词)
• argument [´ɑ:gjumənt] n.辩论；争论；论证 (初中英语单词)
• ability [ə´biliti] n.(办事)能力；才干 (初中英语单词)
• otherwise [´ʌðəwaiz] ad.另外 conj.否则 (初中英语单词)
• studied [´stʌdid] a.故意的；有计划的 (高中英语单词)
• positive [´pɔzətiv] a.确定的 (高中英语单词)
• negative [´negətiv] a.否定的 n.否定词 (高中英语单词)
• neutral [´nju:trəl] a.中立(国)的 (高中英语单词)
• psychology [sai´kɔlədʒi] n.心理(学) (高中英语单词)
• regarding [ri´gɑ:diŋ] prep.关于 (高中英语单词)
• uncomfortable [ʌn´kʌmftəbəl] a.不舒服的，不自在的 (高中英语单词)
• amsterdam [´æmstədæm] n.阿姆斯特丹 (高中英语单词)
• seeing [si:iŋ] see的现在分词 n.视觉 (高中英语单词)
• prompt [prɔmpt] a.敏捷的 vt.促使 (高中英语单词)
• sadness [´sædnis] n.悲哀；悲痛；凄惨 (高中英语单词)
• behavior [bi´heiviə] n.举止，行为 (高中英语单词)
• separately [´sepəritli] ad.分离地；孤独地 (英语四级单词)
• maturity [mə´tjuəriti] n.成熟；完备 (英语四级单词)
• physically [´fizikəli] ad.按照自然规律 (英语四级单词)
• uncertainty [ʌn´sə:tənti] n.不可靠；不确定的事 (英语四级单词)
• simultaneously [,siməl´teinjəsli] ad.同时，一起 (英语四级单词)
• alternative [ɔ:l´tə:nətiv] a.二中选一的 n.选择 (英语四级单词)
• creative [kri:´eitiv] a.有创造力的；创作的 (英语四级单词)
• consistently [kən´sistəntli] ad.一致地；始终如一地 (英语六级单词)
• psychologist [sai´kɔlədʒist] n.心理学家 (英语六级单词)
• spouse [spauz] n.配偶 (英语六级单词)