Memory enhancement

TYPE OF PSYCHOLOGY: Clinical; Cognitive; Counseling; Developmental; Neuropsychological

Memory enhancement is the improvement of long-term memory retrieval through either external or internal memory strategies. External strategies place a cue in the physical environment to prompt memory, including practical techniques like using a day planner, putting one's briefcase by the door, or setting a timer. In contrast, internal memory strategies are systematic mental techniques that aid memory by recoding and storing information more memorably. These include mnemonic techniques such as first-letter mnemonics, the keyword method, the face-name mnemonic, the pegword method, and the method of loci.

Introduction

Before introducing specific strategies for enhancing memory, it is important to differentiate two types of memory. In their classic “box model” of information processing, Atkinson and Shiffrin (1968) described several components, including short-term and long-term memory. Short–term memory refers to what the individual is currently thinking about. It is temporary in nature, and information is held in this “box” only briefly unless it is rehearsed. Contemporary memory theorists frequently use the term “working memory,” a concept further refined by Baddeley and Hitch (1974) and later expanded by Baddeley to include multiple components: the phonological loop, visuospatial sketchpad, episodic buffer, and central executive.

Rehearsal in working memory (essentially, one's conscious awareness) can take two forms: maintenance rehearsal (e.g., mentally repeating something) or elaborative rehearsal (e.g., connecting new information to prior knowledge, perhaps by using a mnemonic strategy). Both can help transfer information from working memory into more permanent long-term memory.

Individuals who complain of losing their train of thought mid-sentence, or of forgetting what they were seeking after walking into a closet, are referring to problems with their “here and now” short-term memory, or working memory. In contrast, when someone complains that they cannot remember a former classmate's name, or what they did last weekend, they are referring to problems with retrieval from long-term memory.

Using external or internal mental strategies can enhance retrieval from long-term memory (e.g., remembering). Again, external strategies place a cue of some sort in the physical environment to prompt memory. On the other hand, internal memory strategies are elaborative cognitive techniques that facilitate storing and retrieving information from long-term memory. Anyone can use memory enhancement exercises to sharpen memory, but they can be particularly useful for older adults and individuals with cognitive impairments.

External Memory Aids

In the twenty-first century, external memory strategies abound. Beyond traditional techniques such as making a list or using a pill box with designated days of the week, modern technology can cue us to do things at certain times—and perhaps obviate the need for memorizing some information because the answer is constantly and instantly available. Smartphones and digital assistants (e.g., Siri, Google Assistant, Alexa) can cue users to complete tasks at designated times. Wearables and smartwatches can provide medication reminders or location-based alerts. Navigation devices reduce the cognitive demand for remembering directions. Applications such as Google Calendar, Todoist, Notion, and Evernote help externalize memory. While these tools often reduce the need to memorize certain types of information, there remain many situations where internal strategies are necessary.

Internal Memory Strategies

One way to move information from short-term working memory (our consciousness) to long-term memory is to use simple rote rehearsal. For example, mentally saying something over and over to oneself can be a useful memory strategy, particularly when combined with retrieval practice (e.g., using flash cards), a technique shown to improve memory through the "testing effect."

Another way to store information effectively in long-term memory is through a mnemonic strategy. Mnemonics are systematic mental techniques that recode and store information in a way that aids retrieval. Worthen and Hunt (2011) list four basic processes that underlie effective mnemonic strategies: elaboration, organization, distinctiveness, and mental imagery. Thus, mnemonic techniques may help make information more memorable in the following ways: (a) elaborating upon it; (b) systematically organizing the to-be-remembered information; (c) making the information more distinctive; and (d) using mental imagery to connect otherwise unrelated information.

Letter-Based Mnemonics

Acronyms and other letter-based mnemonics are widely used. For example, a first aid student may learn the acronym “RICE” to help cue the four steps in treating minor injuries: rest, ice, compression, and elevatation. Or, a student in a science class may learn “ROY G. BIV” to remember the colors of the spectrum in order: red, orange, yellow, green, blue, indigo and violet. The strategy can also take the form of a rhyming sentence, such as in learning “On old Olympus' towering tops, a Finn and a German viewed some hops” to cue memory for the 12 cranial nerves in order (e.g., olfactory, optic, oculomotor, trochlear, trigeminal, etc.). In the latter two, the letter-based mnemonics cue not only the particular words but also convey their fixed orders. However, individual letters are sometimes rather weak prompts for the to-be-remembered words when multiple words begin with the same letter.

The Keyword Method

Among mnemonic strategies, the keyword method has received the most attention from researchers, and it is particularly useful in paired-associate learning, such as foreign vocabulary or anatomy. This versatile strategy can help improve paired-associate verbal learning (e.g., learning a foreign word and its meaning or a part of the brain and its function). For example, if one wants to remember that the brain's Broca's Area is involved in speech production, first, the unfamiliar name “Broca” is recoded as a more familiar keyword that it resembles, such as “broken.” Second, the keyword interacts with “production of speech” through an interactive mental image. For example, one might “imagine that a talking doll is broken so that it cannot talk.” Having interacted with the material in this manner, upon seeing the name “Broca's Area,” retrieval proceeds as follows: “Broca” > “broken” > mental image involving the talking doll > talking (or the production of speech).

Further, using a “dual-keyword” approach, one can associate two unfamiliar names or terms, allowing for bidirectional retrieval. For example, to associate states and their capitals, consider Kansas, whose capital is Topeka. Keywords for Kansas and Topeka are then selected, such as can (for Kansas) and top (for Topeka). Then, one can combine the two by way of an interactive mental image, such as “a tin can (Kansas) with a top (Topeka) spinning on top of it.” Further, encoding the information through interactive imagery yields good associative symmetry. That is, retrieval works well in either direction. For example, the retrieval path may proceed as follows: Kansas > “can” > mental image of can with top spinning on it > “top” > Topeka. Or, retrieval may proceed as follows: Topeka > “top” > mental image of can with top spinning on it >“can” > Kansas.

The Face-Name Mnemonic

Remembering names can be challenging. For this task, memory improvement books often recommend the face-name mnemonic (e.g., Higbee, 1993). As with the keyword method, the face-name mnemonic involves recoding the person's name as a keyword (or name clue). Second, the strategy requires the identification of a prominent feature of the person. Finally, the name clue is connected with the prominent feature by way of an interactive mental image. For example, consider the actress Julianne Moore who is known for her striking red hair. First, her name “Julianne” can be recoded as a keyword or name clue, such as “jewels.” Then, “jewels” are tied to her prominent red hair by way of an interactive mental image. For example, one might “imagine her beautiful red hair covered with sparkling jewels (Julianne).” Then, upon seeing her, remembering proceeds as follows: beautiful red hair > mental image of her red hair covered with sparkling jewels > jewels > Julianne. One can use the technique to remember first or last names, as desired.

The Pegword Method

This technique helps remember ordered lists. It involves learning an easily memorized list of concrete pegwords that rhyme with numbers often presented as: one is a bun, two is a shoe, three is a tree, four is a door, five is a hive, and so forth. After memorizing the list of number-cued pegwords, the next step is to interact each to-be-remembered item with its corresponding pegword. For example, consider a back-to-school shopping list that includes pencils, paper, crayons, scissors, and glue. One then forms a mental image of each item interacting with a pegword. For example, you might imagine (a) a hamburger bun skewered with sharpened pencils, (b) a shoe stuffed with paper, (c) a tree with lots of colorful crayons hanging from its branches, (d) prying open a door with a pair of scissors, and (e) pouring glue down a bee hive. Once the items have been encoded in this fashion, one simply goes down the list of numbers to cue each desired item. For example, one > bun > image of bun skewered with pencils > pencils; then two >shoe > image of shoe stuffed with paper > paper, and so forth. Although the order of this particular list may not be important, there are situations where remembering things in order is important, and this strategy preserves that order.

The Method of Loci

The method of loci is a technique that traces its origin to ancient Greece—loci means “places” in Latin. Like first-letter mnemonics and the pegword method, the method of loci is designed to store and enhance retrieval of a list of items in a fixed order. First, a well-known set of locations are identified such as one might consecutively pass on a walk in some location. For example, perhaps a walk through a local park passes a gate, a bench, a bird bath, and so forth. Second, the to-be-remembered items are “placed” in these locations, optimally by way of interactive mental images. Using the same back-to-school list as above, we might imagine: the gate closing on and breaking a pencil, the bench covered with paper, a bird bath filled with loose, colorful crayons, and so forth. Having stored the items in these locations, we then retrieve them by taking a mental walk down that familiar path or route. Each location serves to prompt the interactive mental image, and the image cues the desired item.

Additional Strategies and Scientific Insights

Modern cognitive research has identified several additional strategies that support long-term memory retention. For example, spaced repetition systems (SRS) present information at optimal intervals for review. SRS takes advantage of the spacing effect by reinforcing learning just as memory traces begin to fade, which improves recall over time. Mobile applications like Anki and SuperMemo rely on these principles.

Interleaving involves alternating between different topics or types of material during study sessions. Rather than focusing on a single subject in a blocked fashion, mixing related subjects improves discrimination and adaptability. This approach creates what researchers call "desirable difficulties" that strengthen long-term retention and transfer of knowledge. Research by Bjork and Bjork (2020) found that conditions that make learning seem harder in the short term, such as interleaving, self-testing, and varied practice, actually enhance durable memory formation—forcing the brain to engage in effortful retrieval and flexible thinking ultimately consolidates learning more robustly. Learners may feel less confident under these conditions, but their retention significantly improves over time.

Chunking is a fundamental memory technique; individuals break down large amounts of information into smaller “chunks” that have meaning. For example, instead of trying to memorize 1-9-4-5-2-0-2-3, this can be chunked into 1945 and 2023, associating them with significant years. This strategy aligns with the human cognitive system's natural processes and organizational methods.

Finally, storytelling techniques tap into the brain's desire for structure and meaning. By embedding information within a story or sequence of events, learners can better recall details because they are anchored within a broader, meaningful context. This is particularly effective for abstract, complex, or hard-to-remember material.

Bibliography

Arden, J. B. Rewire Your Brain 2.0: Five Healthy Factors to a Better Life. 2nd ed., Jossey-Bass, 2023.

Bjork, R. A., and E. L. Bjork. “Desirable Difficulties in Theory and Practice.” Journal of Applied Research in Memory and Cognition, vol. 9, no. 4, 2020, pp. 475–79, doi:10.1016/j.jarmac.2020.09.003. Accessed 27 Mar. 2026.

Budson, A. E., and P. R. Solomon. Memory Loss, Alzheimer’s Disease and Dementia: A Practical Guide for Clinicians. 3rd ed., Elsevier, 2022.

Cherry, K. “How to Improve Memory Effectively.” Verywell Mind, 11 Mar. 2026, www.verywellmind.com/great-ways-to-improve-your-memory-2795356. Accessed 27 Mar. 2026. “Early Treatment of Injury.” Medline Plus, 1 Apr. 2025, medlineplus.gov/ency/imagepages/19396.htm. Accessed 27 Mar. 2026.

Harvard Health Publishing. “Memory.” Harvard Health, 21 Mar. 2022, www.health.harvard.edu/topics/memory. Accessed 27 Mar. 2026.

Henner, M., and L. Henner. Total Memory Makeover: Uncover Your Past, Take Charge of Your Future. Gallery Books, 2012.Higbee, K. L. Your Memory: How It Works and How to Improve It. 3rd ed., Prentice Hall, 1993.

Lorayne, H., and J. Lucas. The Memory Book. Ballantine Books, 1974.

Loprinzi, P. D., et al. “Acute and Chronic Exercise Effects on Human Memory: What We Know and Where to Go from Here.” Journal of Clinical Medicine, vol. 10, no. 21, 2021, doi:10.3390/jcm10214812. Accessed 27 Mar. 2026.

McPherson, F. The memory key: Unlock the secrets to remembering. Barnes and Noble, 2000.

Putnam, A. L. “Mnemonics in Education: Current Research and Applications.” Translational Issues in Psychological Science, vol. 1, no. 2, 2015, pp. 130–39. doi:10.1037/tps0000023. Accessed 27 Mar. 2026.

Worthen, J. B., and R. R. Hunt. Mnemonology: Mnemonics for the 21st Century. Psychology Press, 2011.