The learner's emotional state or affect can interfere with acquiring a new language because acquiring a new language inevitably involves practicing it in public and conversing with others. All these encompassed the possibility of making mistakes, resulting in embarrassment, and such anxiety can block the ability to receive and process new information. Thus, high self-consciousness and a reluctance to reveal their weaknesses and faults, coupled with feelings of vulnerability could greatly impede second language learning. Fear of embarrassment has been found to occur more in adults than children because adults are more self-conscious about speaking, making errors and are more easily demoralized by pronunciation difficulties. In addition, the Critical Period Hypothesis states that younger learners have certain advantages over older learners in language learning that allows them to learn L2 easily and quickly in comparison to older children. When the critical period is over, it is nearly impossible to reach native-like proficiency in one's second language and even those who learn a language fluently are probably recognized as having an accent. Although they can achieve expertise in a written language, they face problems in spoken language. Hence, age can also be regarded as an influential factor determining the quality of second language learning.