# R-L

Acronym | Definition |
---|---|

R-L | Right to Left |

R-L | Republican-Liberty (Party) |

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Acronym | Definition |
---|---|

R-L | Right to Left |

R-L | Republican-Liberty (Party) |

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Figure 1 shows the distribution of L-R hand skill differences (L-R scores = 100 x R-L)/(R + L)) for HDT subtest tracing lines.

Our findings for the distribution of R-L hand skill measures compare well with those of the study of Annett (1992).

Similar results of absolute level of hand skill in R-L groups can be found in all of our five hand skill subtests.

In order to obtain best comparability to Annett (Annett & Manning, 1990a), the scores for R-L skill in tracing lines were used and classified into four equal groups (quartiles) of approximately 25 per cent each.

There is a linear relationship between R-L group and spelling scores.

Annett & Manning (1990a) found that poor readers were more frequent at the extremes (quartiles 1 and 4) of the R-L hand skill distribution and good readers more frequent in quartile 2 and especially infrequent in quartile 4, confirming as expected a U-shaped trend for poor readers and an inverted U-shape distribution for good readers across the laterality continuum.

The continuum of R-L scores in tracing lines was divided into groups of approximately 20, 30, 30, 20 per cent (to conform to Annett & Manning, 1989) and mean scores of the four groups for nonverbal intelligence, using the CFT-20 of Cattell, were calculated.

To test the prediction of the (RS) theory that educational success would be lower at both extremes of the R-L continuum, and especially in strong dextrals (Annett, 1993c), the sample was divided into four quartiles for R-L hand skill differences in tracing lines (Ns = 136, 136, 135, 138) and frequencies of levels of school leaving qualifications (1 = low, 2 = medium, 3 = high) were calculated for the quartiles.

We find significant differences for the sex ratios over the four quartiles of the R-L continuum in the subtest tracing lines ([[Chi].sup.2](3) = 27.2, p = .001).

For males the 3 x 4 analysis of educational level and R-L quartiles shows a trend with higher proportions of good educational success (level 3) for strong right handers (quartile 4) ([[Chi].sup.2](6) = 11.27, p = .08).

Neither the expected quadratic relationship in form of an inverted U between R-L hand skill continuum and verbal abilities (Annett & Manning, 1990a) nor the prediction that strong dextrals are at a risk of lower ability (Annett & Manning, 1989) could be confirmed.

In a planned contrast they found that children in quartile 4 of the R-L continuum performed significantly worse compared to quartile 2.

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- R-CQICH
- R-CSCH
- R-Cytodine Monophosphate
- R-D
- R-DAS
- R-DAT
- R-DAT system
- R-DAY
- R-DAY
- R-DCCH
- R-DOT
- R-dropping
- R-DSCH
- R-EACH
- R-EGA
- R-EMAP
- R-FCAR
- R-FCH
- R-FDTD
- R-FMECA
- R-gliding
- R-gliding
- r-GPL
- R-GVB
- r-hGH
- R-HOUR
- R-ICCH
- R-ISMA
- R-iti
- R-J
- R-L
- R-LEX
- R-Lipoic Acid
- R-Lipoic Acid
- R-Lipoic Acid
- R-M
- R-MA
- R-MAD
- R-MASK
- R-Matrix Propagation
- R-MC
- R-MED
- R-methodology
- R-MIC
- R-MMSE
- R-MR
- R-MR-CI
- R-msses
- R-mwc
- R-mwc
- R-n
- R-n
- R-n
- R-NGF
- R-O
- R-OADM
- R-OH
- R-on-T phenomenon
- R-p mycin
- R-p mycin
- R-p mycin
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