in studies focused on reward systems that control food-seeking behavior (Balleine, 2005). Researchers have focused on learning processes and modulatory processes that are present while encoding and retrieving goal values. When an organism seeks food, the anticipation of reward based on environmental events becomes another influence on food seeking that is separate from the reward of food itself. Therefore, earning the reward and anticipating the reward are separate processes and both create an excitatory influence of reward-related cues. Both processes are dissociated at the level of the amygdala, and are functionally integrated within larger neural systems. Motivational intensity and cognitive scope Measuring cognitive scope Cognitive scope can be measured by tasks involving attention, perception, categorization and memory. Some studies use a flanker attention task to figure out whether cognitive scope is broadened or narrowed. For example, using the letters "H" and "N" participants need to identify as quickly as possible the middle letter of 5 when all the letters are the same (e.g. "HHHHH") and when the middle letter is different from the flanking letters (e.g. "HHNHH"). Broadened cognitive scope would be indicated if reaction times differed greatly from when all the letters were the same compared to when the middle letter is different. Other studies use a Navon attention task to measure difference in cognitive scope. A large letter is composed of smaller letters, in most cases smaller "L"'s or "F"'s that make up the shape of the letter "T" or "H" or vice versa. Broadened cognitive scope would be suggested by a faster reaction to name the larger letter, whereas narrowed cognitive scope would be suggested by a faster reaction to name the smaller letters within the larger letter. A source-monitoring paradigm can also be used to measure how much contextual information is perceived: for instance, participants are tasked to watch a screen which serially displays words to be memorized for 3 seconds each, and also have to remember whether the word appeared on the left or the right half of the screen. The words were also encased in a colored box, but the participants did not know that they would eventually be asked what color box the word appeared in. Main research findings Motivation intensity refers to the strength of urge to move toward or away from a particular stimulus. Anger and fear affective states, induced via film clips, conferred more selective attention on a flanker task