Adults' use of subtraction by addition.

16:07 EDT 28th May 2015 | BioPortfolio

Summary of "Adults' use of subtraction by addition."

The present study investigates adults' use of addition to solve two-digit subtractions. Inspired by research on single-digit arithmetic, we first examined regression models in which different problem characteristics predicted participants' reaction times. Second, we compared performance on two-digit subtractions presented in 2 presentation formats, i.e., the standard subtraction format (81-37=.) and an addition format (37+.=81). Both methods lead to the conclusion that the participants switched between direct subtraction and subtraction by addition depending on the relative size of the subtrahend: If the subtrahend was smaller than the difference, direct subtraction was mainly used; if the subtrahend was larger than the difference, subtraction by addition was the dominant strategy. However, this performance pattern was only observed when the distance between the subtrahend and the difference was large; when the subtrahend and the difference were close to each other, there was no subtrahend-dependent selection of direct subtraction vs. subtraction by addition. These data indicate that theoretical models of people's strategy choices in subtraction should include the relative size of the subtrahend as an important factor in the strategy selection process.


Centre for Instructional Psychology and Technology, K.U.Leuven, Belgium.

Journal Details

This article was published in the following journal.

Name: Acta psychologica
ISSN: 1873-6297


PubMed Articles [9837 Associated PubMed Articles listed on BioPortfolio]

Numerical study of the subtraction threshold for fluorescence difference microscopy.

Subtraction microscopy has recently been promoted for its compactness and simplicity of enhancing spatial resolution. However, until now, the subtraction factors used in such microscopes to process ra...

Addition and subtraction in wild New Zealand robins.

This experiment aimed to investigate proto-arithmetic ability in a wild population of New Zealand robins. We investigated numerical competence from the context of computation: behavioural responses to...

Generalization effects in Canadian and Chinese adults' simple addition.

Recent studies proposed that skilled adults solve simple addition problems (e.g., 2 + 3 = 5) by automatic counting procedures rather than fact retrieval for memory. To pursue this, the authors tested ...

A comparative study of smart spectrophotometric methods for simultaneous determination of sitagliptin phosphate and metformin hydrochloride in their binary mixture.

Simple, specific, accurate and precise spectrophotometric methods were developed and validated for the simultaneous determination of the oral antidiabetic drugs; sitagliptin phosphate (STG) and metfor...

Vaccination in HIV-Infected Adults.

Abstract Vaccines are critical components for protecting HIV-infected adults from an increasing number of preventable diseases. However, missed opportunities for vaccination among HIV-infected persons...

Clinical Trials [2075 Associated Clinical Trials listed on BioPortfolio]

Validation of Coronary Calcium Subtraction to Improve Diagnostic Accuracy of Coronary CT Angiography

Coronary calcium hampers accurate evaluation of the coronary arteries with coronary computed tomography angiography (CCTA). A novel approach to potentially overcome this limitation is coro...

CE-MRA Using Gadovist in Comparison to IA DSA Using Ultravist

This trial is to show the diagnostic efficacy of Gadovist for contrast enhanced magnetic resonance angiography (CE-MRA) of the arteries.

Isovue in Peripheral Digital Subtraction Angiography

No significant differences in observed motion artifacts or pain reported during peripheral DSA performed for diagnostic and/or endovascular therapeutic purposes.

Safety of BB-12 Supplemented Strawberry Yogurt For Healthy Adults on Antibiotics

We believe a readily available drink containing a high dose of probiotics has the potential to improve compliance through many of these mechanisms. This product also has the potential to p...

Effectiveness of Quaker Complete Nutrition Supplements for Malnourished Adults

Intervention study in malnourished adults to assess whether a nutritional supplement given for 8 weeks in addition to the subject's usual diet improves body weight, body composition, bioch...

Medical and Biotech [MESH] Definitions

The chromosomal constitution of cells which deviate from the normal by the addition or subtraction of CHROMOSOMES, chromosome pairs, or chromosome fragments. In a normally diploid cell (DIPLOIDY) the loss of a chromosome pair is termed nullisomy (symbol: 2N-2), the loss of a single chromosome is MONOSOMY (symbol: 2N-1), the addition of a chromosome pair is tetrasomy (symbol: 2N+2), the addition of a single chromosome is TRISOMY (symbol: 2N+1).

A method of delineating blood vessels by subtracting a tissue background image from an image of tissue plus intravascular contrast material that attenuates the X-ray photons. The background image is determined from a digitized image taken a few moments before injection of the contrast material. The resulting angiogram is a high-contrast image of the vessel. This subtraction technique allows extraction of a high-intensity signal from the superimposed background information. The image is thus the result of the differential absorption of X-rays by different tissues.

Simple rapid heartbeats caused by rapid discharge of impulses from the SINOATRIAL NODE, usually between 100 and 180 beats/min in adults. It is characterized by a gradual onset and termination. Sinus tachycardia is common in infants, young children, and adults during strenuous physical activities.

A process that changes the nucleotide sequence of mRNA from that of the DNA template encoding it. Some major classes of RNA editing are as follows: 1, the conversion of cytosine to uracil in mRNA; 2, the addition of variable number of guanines at pre-determined sites; and 3, the addition and deletion of uracils, templated by guide-RNAs (RNA, GUIDE).

Combination or superimposition of two images for demonstrating differences between them (e.g., radiograph with contrast vs. one without, radionuclide images using different radionuclides, radiograph vs. radionuclide image) and in the preparation of audiovisual materials (e.g., offsetting identical images, coloring of vessels in angiograms).

Search BioPortfolio:

Searches Linking to this Article