Working memory is our ability to store and manipulate information for a brief time. It is typically measured by dual-tasks, where the individual has to remember an item while simultaneously processing a sometimes unrelated piece of information. A widely used working memory task is the reading span task where the individual reads a sentence, verifies it, and then recalls the final word. Individual differences in working memory performance are closely related to a range of academic skills such as reading, spelling, comprehension, and mathematics. Crucially, there is emerging research that working memory predicts learning outcomes independently of IQ. One explanation for the importance of working memory in academic attainment is that because it appears to be relatively unaffected by environmental influences, such as parental educational level and financial background, it measures a student’s capacity to acquire knowledge rather than what they have already learned.

However little is known about the consequences of low working memory capacity per se, independent of other associated learning difficulties. In particular, it is not known either what proportion of students with low working memory capacities has significant learning difficulties or what their behavioral characteristics are. The aim of a recent study published in Child Development (reference below) was to provide the first systematic large-scale examination of the cognitive and behavioral characteristics of school-aged students who have been identified solely on the basis of very low working memory scores.

In screening of over 3000 school-aged students in mainstream schools, 1 in 10 was identified as having working memory difficulties. There were several key findings regarding their cognitive skills. The first is that the majority of them performed below age-expected levels in reading and mathematics. This suggests that Read the rest of this entry »

Given the growing media coverage mentioning the terms Cognitive Reserve and Brain Reserve, you may be asking yourself, “What exactly is my Cognitive (or Brain) Reserve?”

The cognitive reserve hypothesis, tested in multiple studies, states that individuals with more cognitive reserve can experience more Alzheimer’s disease pathology in the brain (more plaques and tangles) without developing Alzheimer’s disease symptoms.

How does that work? Scientists are not sure but two possibilities are considered.
1. One is that more cognitive reserve means more brain reserve, that is more neurons and connections (synapses) between neurons. Individuals with more synapses would then have more synapses to lose before the critical threshold for Alzheimer’s Disease is reached.
2. Another possibility is that more cognitive reserve means more compensatory processes. The brain of individuals with more cognitive reserve would use more alternative networks to compensate for the damages caused by the pathology in previously used networks.

In a newly published study, Roe and colleagues from Washington University in St. Louis, used the number of years of education as a measure of cognitive reserve. Why years of education? Because previous studies have shown that people who have more education also exhibit a greater resistance to Alzheimer’s symptoms, even while pathological changes are occurring in the brain (see Bennett el al., 2003 or Roe, Xiong, et al., 2008).

Roe and her colleagues studied 198 individuals whose mean age was 67. Out of these 198 individuals, 161 were nondemented and 37 were diagnosed with Alzheimer’s Disease.

All the participants in the study took a Read the rest of this entry »

A few colleagues referred me over the weekend to a very nice article at business publication Portfolio.

While the article does an excellent job at introducing the reader to the concept and promise of computerized cognitive assessments, it also contributes to the mythology of “Brain Age”.

Let’s first take a look at the article How Smart Are You: The business of assessing cognition and memory is moving from testing brain-impaired patients to assessing healthy peoples’ brains online.

A couple of quotes:

- “Cognitive Drug Research is one a handful of businesses, most of them outside of the U.S., that work with pharmaceutical companies to test how new drugs for everything from nicotine addiction to Alzheimer’s disease affect the mind’s ability to remember things, make decisions, and analyze information.”

- “Cognitive tests have been around for a century as examinations taken with paper and pencil. In the 1970s and ’80s the tests shifted to computers, Cognitive Drug Research founder Keith Wesnes says.

So far, so good. In fact, one of the key highlights from the market report we released in March was that “Large-scale, fully-automated cognitive assessments are being used in a growing number of clinical trials. This opens the way for the development of inexpensive consumer-facing, baseline cognitive assessments.” And we profiled a few leading companies in the space: Brain Resource Company, Cognitive Drug Research, CNS Vital Signs and CogState.

Now, the article is accompanied by a 5-7 minute quick test that promises to give us our “Brain Age”. And this doesn’t come from Nintendo, but from Cognitive Drug Research, a respected science-based company.

You can check it out Read the rest of this entry »

Round-up of interesting recent news on cognitive health and fitness: the field is in motion.

1) Baycrest creates Centre for Brain Fitness with $10-million Investment from Ontario Government (Canada NewsWire)

2) Cognitive tests are the best way to select medical students (EurekAlert)

3) High blood pressure hard on the aging brain (Reuters)

4) Alzheimer’s tests beneficial for seniors (Atlanta-Journal Constitutional)

5) Dementia-Dreading Baby Boomers Spur Race to Invent Brain Games (Bloomberg)

6) Vivity Labs launches Fit Brains brain-training game site (VentureBeat) 

7) Depression and Alzheimer’s (NHS Choices)

For selected quotes and comments, Read the rest of this entry »

Fun quick article, titled Review: Latest Brain-Teasing Video Games, on Brain Training, “Nintendo Brain Age”, “Big Brain Academy”, “Hot Brain”, ”Brain Boost”, “Brain Genius”, “Brain Juice”, “Brain Challenge”, “Mind Quiz”…

Please remember to use our checkists on How to Select the Right Brain Fitness Program-short checklist or the full length version-, if you are looking for real benefits beyond entertainment.