The correct answer is TRUE.
Mass media influence socialization negatively, in the sense that, during the amount of time that people spend in front of the TV, for example, they cannot be joining other activities with much more social content such as spending time with other friends or other people, having a conversation, meeting new people, etc.
Moreover mass media and publicity set up trends that affect every aspect of human life, including socialization. For example, nowadays many people communicate with others through social networks, which are on fashion now, instead of making a phone call or meeting someone in person.