A method for assessing viewer interest in content and advertisements may include receiving an indication regarding a content playback mode change (e.g., a change from a skip or fast-forward mode to a pause or rewind mode) occurring during playing of a media content segment such as a television program or movie. The method then proceeds to associate the playback mode change with a sub-segment of the television program, such as an advertisement or commercial, and a level of interest of a user in the advertisement or commercial is determined based on the associated content playback mode change. An item, such as an advertisement or promotional offer can be selected to be presented to the user based on the determined level of interest of the user in the advertisement or commercial. Systems for assessing viewer interest in content and advertisements include devices and components configured to perform or enable such methods.