data_low_vision

A dataset containing raw MNREAD data for 12 subjects with low vision. 
6 subjects were treated with treatment A while the other 6 were given treatment B.
Each subject was tested twice on the MNREAD:<ul>
<li>once on the regular polarity of the test (black print on white background)</li>
<li>once on the reverse polarity of the test (white print on black background)</li>
</ul>

datasets

Allows to analyze the reading data obtained with the MNREAD Acuity
Chart, a continuous-text reading acuity chart for normal and low vision.
Provides the necessary functions to plot the MNREAD curve and estimate
automatically the four MNREAD parameters: Maximum Reading Speed,
Critical Print Size, Reading Acuity and Reading Accessibility Index.
Parameters can be estimated either with the standard method
or with a nonlinear mixed-effects (NLME) modeling.
See Calabrese et al. 2018 for more details <doi:10.1167/18.1.8>.

Aurélie Calabrèse

mnreadR

MNREAD Parameters Estimation and Curve Plotting

J. Steve Mansfield

Gordon E. Legge

data_low_vision function

A data frame with 437 rows and 7 variables, where each line stores data for one sentence:<dl>
 <dt>subject</dt>
<dd>subject ID code</dd> <dt>polarity</dt>
<dd>test polarity used (regular or reverse)</dd> <dt>treatment</dt>
<dd>treatment given to the subject (A or B)</dd> <dt>vd</dt>
<dd>viewing distance in cm</dd> <dt>ps</dt>
<dd>print size in logMAR, as written on the chart (print size uncorrected for viewing distance)</dd> <dt>rt</dt>
<dd>reading time in seconds</dd> <dt>err</dt>
<dd>number of errors</dd> ...</dl>

Format

MNREAD data collected in subjects with low vision. — data_low_vision

A data frame with 437 rows and 7 variables, where each line stores data for one sentence:<dl>
 <dt>subject</dt>
<dd>subject ID code</dd>

 <dt>polarity</dt>
<dd>test polarity used (regular or reverse)</dd>

 <dt>treatment</dt>
<dd>treatment given to the subject (A or B)</dd>

 <dt>vd</dt>
<dd>viewing distance in cm</dd>

 <dt>ps</dt>
<dd>print size in logMAR, as written on the chart (print size uncorrected for viewing distance)</dd>

 <dt>rt</dt>
<dd>reading time in seconds</dd>

 <dt>err</dt>
<dd>number of errors</dd>

 ...

</dl>

data_low_vision: MNREAD data collected in subjects with low vision.

Description

Usage

Arguments

Format