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kurokida · Jun 28, 2024 · 4e95bde · 4e95bde
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diff --git a/docs/_pages/pixijs.md b/docs/_pages/pixijs.md
@@ -5,7 +5,7 @@ title: "Psychophysics plugin with PixiJS"
 
 Starting with version 3.2.0, the psychophysics plugin can present visual stimuli using [PixiJS](https://pixijs.com/) functionality. You can turn on and off Pixi mode, but if you present drifting gabor patches Pixi mode should be turned on.
 
-If you are interested in Pixi mode, please see [the results of an accuracy test conducted in April 2022](https://www.hes.kyushu-u.ac.jp/~kurokid/PixiJS_test/AccuracyTest202204/histogram20220421.html) at first. I obtained good results in total, but I am a little concerned about Firefox. Note that I have only checked one laptop.
+If you are interested in Pixi mode, please see [the results of an accuracy test conducted in June 2024](https://osf.io/pj4sb/wiki/Accuracy%20test%20June%202024/) at first.
 
 # How to turn on Pixi mode
 
@@ -48,14 +48,14 @@ const trial = {
 
 - There may be a way to enable anti-aliasing, but I have yet to find it. You can clearly see the difference between anti-aliasing [on](https://www.hes.kyushu-u.ac.jp/~kurokid/PixiJS_test/psychophysics-demos/dynamically_change.html?pixi_flag=0) and [off](https://www.hes.kyushu-u.ac.jp/~kurokid/PixiJS_test/psychophysics-demos/dynamically_change.html?pixi_flag=1). 
 - You may feel a flash of screen immediately after the trial when the background color is not white. In this case, you can avoid the problem by writing as `<body bgcolor="gray"></body>`.
-- The quality of text seems to be better in non Pixi mode. For example, [Pixi mode](https://www.hes.kyushu-u.ac.jp/~kurokid/PixiJS_test/psychophysics-demos/mask_filter_with_label.html?pixi_flag=1) and [Non Pixi mode](https://www.hes.kyushu-u.ac.jp/~kurokid/PixiJS_test/psychophysics-demos/mask_filter_with_label.html?pixi_flag=0)
+- The quality of text seems to be better in non Pixi mode. For example, [Pixi mode](https://www.hes.kyushu-u.ac.jp/~kurokid/jspsychophysics/demos/mask_filter_with_label.html?pixi_flag=1) and [Non Pixi mode](https://www.hes.kyushu-u.ac.jp/~kurokid/jspsychophysics/demos/mask_filter_with_label.html?pixi_flag=0)
 
 So, please switch between Pixi modes depending on the purpose of the experiment.
 
 # Advanced usage
 
 Using the PixiJS application's ticker, you can change attributes of the stimulus. See the "Writing an Update Loop" section in [the PixiJS guides](https://pixijs.io/guides/basics/getting-started.html). To do the same thing in the psychophysics plugin, use the change_attr function. See [demos/change_attributes.html](https://github.com/kurokida/jspsych-psychophysics/blob/master/psychophysics-demos/change_attributes.html) and [demos/elapsed_time_frame_pixi.html](https://github.com/kurokida/jspsych-psychophysics/blob/master/psychophysics-demos/elapsed_time_frame_pixi.html).
 
-If you are familiar with PixiJS, you can make the PixiJS instances and include them in the stimuli property of the psychophysics plugin. See the demos/draw_part_of_image_pixi.html.
+If you are familiar with PixiJS, you can make the PixiJS instances and include them in the stimuli property of the psychophysics plugin. See the [demos/draw_part_of_image_pixi.html](https://github.com/kurokida/jspsych-psychophysics/blob/master/psychophysics-demos/draw_part_of_image_pixi.html).
 
 <You can change uniforms.>
diff --git a/docs/index.md b/docs/index.md
@@ -72,6 +72,22 @@ The color can be specified using the HTML color names, hexadecimal (HEX) colors,
 
 The **show_start_time** property is one of the most notable properties, which enables to present the stimulus at the intended time. In this example, a white rectangle is presented 500 ms after beginning this trial, after another 500 ms, a red circle is presented until the response.
 
+If you mind the increase/decrease by 1 frame (16.7 ms) regarding visual stimuli, presentation times should be specified in terms of frames not milliseconds. See [my recent observation (June 2024)](https://osf.io/pj4sb/wiki/Accuracy%20test%20June%202024/).
+
+You can specify the time in frames as follows:
+
+```javascript
+const rectangle = {
+    obj_type: 'rect',
+    width: 100,
+    height: 100,
+    fill_color: 'white',
+    show_start_frame: 0,
+    show_end_frame: 3, // The rectangle is presented for 3 frames (50 ms). 
+    is_frame: true, // Be careful, it's easy to forget. This is necessary for each stimulus.
+}
+```
+
 ### 4. Specify a trial object including all the stimuli in the jsPsych's timeline
 
 ```javascript