textSize

Experiments Surveys & forms Unlike bgColor and textColor, a per-trial text size is not reset when a form page starts, so it stays in effect for the whole page.

Sets the base font size for a single trial. A non-empty value is applied as the page’s font size, so it affects trial text, word stimuli, and any other text that does not set its own explicit size.

Syntax

Put a complete CSS font size, unit included, in the cell, for example 24px. The value is applied exactly as written, with no parsing; a bare number without a unit does nothing.

Options

Value	Effect
(empty)	Skip; setup default stays
<n>px, e.g. 24px	Absolute pixel size
<n>em / <n>% / pt etc.	Any CSS length/percentage works
Keywords small, large…	Valid CSS keywords work
Bare number, e.g. 24	Invalid CSS font-size; silently ignored by the browser, default size stays

Defaults & missing values

• If the column is absent or the cell is left blank, the project default applies (16px unless changed in project settings).
• The project setting is a bare number and gets px added automatically; the column value must carry its own unit.
• A per-trial value lasts one trial; the default is restored when the next trial starts.

Works with

• Screen calibration: the default text size scales with calibration, but per-trial textSize values do not; they are applied exactly as written after calibration.
• Applied at trial start together with bgColor and textColor.
• Word stimuli and trial text inherit the size unless something more specific (for example stimSize handling) overrides them.
• Form trials: unlike bgColor and textColor, textSize is NOT reset when a form starts, so a textSize cell on a type=form row stays in effect for the whole form (subject to the survey’s own explicit sizes) until the next trial.

Examples

type	stim1	stimFormat	textSize
test	apple	word	32px
test	pear	word

Trial 1 shows 32px text; trial 2 reverts to the project default (16px unless set in project settings).

type	trialText	textSize
learn	Read this carefully	1.5em

Tips & gotchas

Caution

Unlike the project default, the column value gets no px appended: 24 does nothing, 24px works.

• Calibration does not rescale per-trial textSize values, so on calibrated projects a per-trial size is physically inconsistent across screens while the default size is not.