Prospective memory
Prospective memory is the cognitive ability to remember to perform intended actions in the future. This can involve tasks ranging from simple daily activities, like watching a television show, to critical responsibilities, such as medical procedures. The significance of the task, the age of the individual, and the presence of competing tasks can all influence how effectively prospective memories are recalled. Individuals may remember these future tasks through conscious monitoring, triggered cues, or spontaneous retrieval, where a memory suddenly comes to mind without deliberate effort.
Research into prospective memory has shown that failures can have a wide range of consequences, from minor annoyances to serious outcomes, such as forgetting to perform medical duties. Factors contributing to these failures include insufficient reminders or disruptions to routine. Strategies to enhance prospective memory include visualization techniques, creating specific triggers, and using external reminders like alarms. Understanding these elements can help individuals better manage their prospective memories, improving their ability to navigate daily responsibilities and commitments.
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Subject Terms
Prospective memory
Prospective memory refers to remembering tasks that need to be performed in the future. Much of human memory is expended on remembering tasks related to a time yet to come. These may range from simple tasks such as remembering to watch a specific television program to complicated responsibilities such as operating on a patient. As a result, the consequences of the failure of prospective memory can be mild (missing a television show) to serious (injury or death of the patient). Prospective memory may be partially affected by the significance of what needs to be remembered, the age of the person doing the remembering, and the number and importance of other tasks being performed at the same time. It may be enhanced or improved through certain tactics or memory helpers.
Background
The ability to form a plan to do something and then follow through with that plan makes much of daily life possible. It helps people accomplish routine tasks, get where they are going, and make plans for the future. As a result, the brain often juggles dozens of prospective memories at a time, all while trying to complete other tasks. The possibility always exists that any of those tasks or another prospective memory will interfere with the ability to recall the memory in a timely manner.
Somehow the person needs to remember the memory at an appropriate time to act on it. The memory must be retrieved along with the actions needed to accomplish it at the right time and in the right place. The process by which this happens has drawn attention from researchers who use surveys and direct observation to study how people recall prospective memories and what can cause people to forget them.
Recalling a prospective memory can happen in several ways. The person may hold it in conscious memory, reflecting nearly continuously on the task that needs to be performed. This is referred to as monitoring the idea. Alternatively, the memory may be triggered by a cue (e.g., seeing a prescription bottle on the counter reminds a person to take blood pressure medication) or by an event (e.g., seeing a friend and remembering to give him or her a message). In some cases, a memory may be remembered spontaneously, without conscious effort to recall it or the presence of a trigger. This is called spontaneous retrieval; it is the process at work when the memory of a task that needs to be performed suddenly "pops" into conscious thought.
Overview
Researchers have investigated how and why people forget to act on prospective memories. Some instances of forgetting have few or no consequences. For example, forgetting to share a funny story with a friend might be annoying but will not hurt anyone. Forgetting other prospective memories can alter our reputation or status; forgetting to pay a bill on time, missing a coffee date with a friend, or forgetting to finish a work project would fall into this category. Some instances of forgetting can have life-or-death consequences. It is this type of prospective memory failure that cause an operating team to leave an instrument in a patient or a parent to leave a child in the car while he or she goes to work.
These failures often happen because a sufficient trigger was not present, because the brain is trying to manage too many tasks and memories at the same time, or because something alters the person's routine and interrupts the memory process. If a person barely registers that a task needs to be done, he or she will have only a faint memory of it and little or no trigger. For example, if a request to stop at the store for bread on the way home is given while a person is simultaneously trying to remember to pack everything he or she needs for the day on the way out the door, he or she will likely forget about picking up the bread.
Sometimes changes to a person's activities or routine can eliminate the usual triggers that help the recall of a prospective memory. For example, a parent who does not usually have responsibility for dropping his or her baby off at daycare may forget and, assuming the child is quiet in the back seat, drive all the way to work without stopping. This is often the force at work when a parent inadvertently leaves a child in the car while he or she is at work.
Some researchers have determined that the significance a person places on the task to be remembered can increase or decrease the likelihood of recall. For example, a child is more likely to remember a planned weekend trip to the movies than plans for the family to clean the garage. Rewards can also increase the odds of remembering; for instance, promising test subjects a reward for each email sent at a specific time increased the chances that the task would be remembered. Researchers have investigated whether age is a factor in memory. Study results have differed. Some results indicate that age affects prospective memories that require monitoring, possibly because the effort of remembering is too great when combined with other tasks.
Researchers have identified a number of tactics that can improve prospective memory. One is visualization. For example, if someone wants to remember to pick up certain items at the grocery store, picturing the items on the shelf and the path taken to reach them can help in the eventual recall. Another option is to create specific triggers, such as thinking about stopping at the pharmacy while sitting behind the wheel of the car so that sitting there on the way home will help to cue the prospective memory. Finally, using external reminders—setting an alarm, for example—can help trigger the necessary prospective memory in a timely manner.
Bibliography
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