Featured Research

from universities, journals, and other organizations

Clarity in short-term memory shows no link with IQ

Date:
November 30, 2010
Source:
University of Oregon
Summary:
One person correctly remembers four of eight items just seen but is fuzzy on details. Another person recalls only two of the items but with amazingly precise clarity. So what ability translates to higher IQ? According to a new study the answer is very clear.

One person correctly remembers four of eight items just seen but is fuzzy on details. Another person recalls only two of the items but with amazingly precise clarity. So what ability translates to higher IQ?

Related Articles


According to a University of Oregon study, the answer is very clear: More items stored in short-term memory is linked to greater fluid intelligence, as measured in IQ tests. The resolution of those memories, while important in many situations, shows no relationship with fluid intelligence.

The notion that numbers of items is vitally important to short-term memory has been shown in previous studies at the UO. Those studies found that people, generally, have a capacity to temporarily store three to five items in short-term memory. Previous research has shown that capacity in short-term memory is a reliable predictor of an individual's IQ.

However, the new study, published in the October issue of the journal Psychonomic Bulletin & Review, sought to take a more comprehensive look at the issue to determine which aspects of memory capacity explained the link with fluid intelligence.

"The number of things people can remember is robustly correlated with fluid intelligence -- the larger number remembered, the higher the IQ." said Edward Awh, a psychology professor and a member of the Oregon Visual Working Memory & Attention Lab. "Resolution in memory is not predictive of IQ at all."

"Clarity," said lead author Keisuke Fukuda, a UO doctoral student, "relates to how well a person can detect small changes." This clarity, Fukuda and Awh noted, is indeed important but is a reflection of a person's experience in specific domains of perception. For example, while Japanese characters may appear to be similar to an American's eye, regular Japanese readers will readily see the differences between distinct characters.

Fukuda put 79 undergraduate students through a series of experiments in which either four or eight objects were shown on a screen for an instant. After a one-second blank screen, one item was returned and the subject asked whether that object had been in a location previously.

By examining the ability to detect large and small changes in the memorized items, Fukuda was able to get estimates of both the number of items maintained in memory, as well as the resolution or clarity of those memories. These aspects of memory were then related to the subjects' scores on tests of fluid intelligence.

The discovery that clarity doesn't factor into a person's IQ score doesn't suggest that memory resolution is unimportant, the researchers noted. The importance of clarity or resolution of things remembered is indeed vital, for example, to a radiologist studying images of a patient's internal organs with potential disease conditions.

Co-authors with Fukuda and Awh on the paper were UO psychology professors Edward Vogel, who is a director in the Oregon Visual Working Memory & Attention Lab, and Ulrich Mayr. The National Institutes of Health supported the research through grants to Awh and Vogel.


Story Source:

The above story is based on materials provided by University of Oregon. Note: Materials may be edited for content and length.


Journal Reference:

  1. K. Fukuda, E. Vogel, U. Mayr, E. Awh. Quantity, not quality: The relationship between fluid intelligence and working memory capacity. Psychonomic Bulletin & Review, 2010; 17 (5): 673 DOI: 10.3758/17.5.673

Cite This Page:

University of Oregon. "Clarity in short-term memory shows no link with IQ." ScienceDaily. ScienceDaily, 30 November 2010. <www.sciencedaily.com/releases/2010/11/101129121123.htm>.
University of Oregon. (2010, November 30). Clarity in short-term memory shows no link with IQ. ScienceDaily. Retrieved March 5, 2015 from www.sciencedaily.com/releases/2010/11/101129121123.htm
University of Oregon. "Clarity in short-term memory shows no link with IQ." ScienceDaily. www.sciencedaily.com/releases/2010/11/101129121123.htm (accessed March 5, 2015).

Share This


More From ScienceDaily



More Mind & Brain News

Thursday, March 5, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Former NFL Players Donate Brains to Science

Former NFL Players Donate Brains to Science

Reuters - US Online Video (Mar. 3, 2015) — Super Bowl champions Sidney Rice and Steve Weatherford donate their brains, post-mortem, to scientific research into repetitive brain trauma. Jillian Kitchener reports. Video provided by Reuters
Powered by NewsLook.com
Alzheimer's Protein Plaque Found In 20-Year-Olds

Alzheimer's Protein Plaque Found In 20-Year-Olds

Newsy (Mar. 3, 2015) — Researchers found an abnormal protein associated with Alzheimer&apos;s disease in the brains of 20-year-olds. Video provided by Newsy
Powered by NewsLook.com
This Nasal Treatment Could Help Ease Migraine Pain

This Nasal Treatment Could Help Ease Migraine Pain

Newsy (Mar. 2, 2015) — Researchers gave lidocaine to 112 patients, and about 88 percent of the subjects said they needed less migraine-relief medicine the next day. Video provided by Newsy
Powered by NewsLook.com
How Facebook Use Can Lead To Depression

How Facebook Use Can Lead To Depression

Newsy (Mar. 1, 2015) — Margaret Duffy of the University of Missouri talks about her study on the social network and the envy and depression that Facebook use can cause. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins