【正确答案】In English teaching, affect will be broadly considered as aspects of emotion, feeling, mood or attitude which condition behavior. There are a number of affective factors that influence English teaching and learning, such as motivation, self-confidence, cooperative spirit and anxiety, all these factors are, in Krashen's term, called "affective filter". Affective factors generally fall into two types: positive and negative.
Positive affective factors refer to the factors that can help learners create a positive psychological state of learning, realize their potential and finally improve their learning effect. Motivation and attitudes are important affective factors which help to determine the level of proficiency achieved by different learners. In certain situations an integrative motivation may be more powerful in facilitating successful L2 learning, but in other situations instrumental motivations may count far more. The stronger the motivation, the better one learns the second language.
Negative factors refer to those that hinder or obstruct language learning. Motivation, attitude, anxiety, confidence etc. are all the factors that influence L2 learning. For example, anxiety, if not much may help L2 learning, but if too much, will make L2 learners worried and nervous, hence constraining L2 learning.

【答案解析】[解析] 本题主要考查的是影响二语习得的情感因素问题。回答时要说明什么是情感因素，接着说明两种不同的情感因素是如何促进或阻碍二语习得的。