Choose an ABA graph time scale from the clinical question and the timing of the source observations. Sessions can clarify learning sequence, while calendar time preserves elapsed gaps. Trials or opportunities may fit within-session acquisition. Label the unit, retain actual dates, and state the spacing rule. One display can use panels when both sequence and elapsed time matter.

Start with the decision

Use calendar time for elapsed-time questions, session order for treatment sequence, and trials or opportunities for within-session learning.

Preserve source dates

Keep actual start and end timestamps even when the display uses session numbers.

Label spacing honestly

State whether equal visual spacing represents equal time, equal sessions, equal opportunities, or another unit.

Use a second panel when useful

Show the same data by session and date when each view answers a different legitimate question.

Build the axis from the source record

Keep one row per observation with the actual date, start time, session ID, opportunity count, condition, and validity state. Generate the display axis from those fields instead of typing labels into the graph. This preserves the relationship between a point and its source when sessions are added, cancelled, or corrected.

Decide how the graph will treat same-day sessions, overnight gaps, school breaks, and long interruptions. A session axis can number two observations on the same day separately. A date axis can place them at the same calendar position or use time of day when that distinction matters. State the rule in the graph note.

Reconcile Kiana's two views

Kiana's four sessions are sessions 1, 2, 3, and 4, so the sequence view gives three equal steps. Calendar spacing is different: August 1 to 2 is one day, August 2 to 9 is seven days, and August 9 to 10 is one day. The calendar view therefore shows that most elapsed time occurs between the second and third observations.

For a maintenance question, that seven-day gap is part of the evidence. For a within-program teaching sequence, the session-number view may remain useful. Showing both panels prevents the session axis from implying regular service delivery while keeping the order of exposure easy to follow.

Match trend language to the axis

On a session axis, describe change across observations or exposures. On a calendar axis, describe change over elapsed days or weeks. Avoid statements about speed, maintenance across time, or service cadence when the graph uses equally spaced session numbers.

When a long gap contains no valid observations, leave it empty and label the known reason at an appropriate privacy level. A blank span communicates missing exposure. It should not become a line of estimated values.

Review ABA graph time scale before release

The x-axis decision log for Kiana identifies the clinical question, source record, unit, denominator, time basis, display rule, qualified decision owner, and next review before construction. Preserve the raw data and the exact graph version shown to reviewers.

Work the graph example for Kiana

Kiana has sessions on August 1, 2, 9, and 10. A session-number axis places all four points evenly. A calendar-date axis shows the seven-day gap between sessions two and three. The clinician uses calendar time for a maintenance question and keeps session number in the source table.

Audit what the display leaves out for Kiana

For Kiana, record missing observations, invalid points, small or zero denominators, phase uncertainty, context changes, access conditions, and any series hidden by aggregation. A clean picture gains value only when those states remain available for review.

Protect access and client meaning for Kiana

During Kiana's transparent graph time scales review, keep AAC, interpreters, mobility, food, water, bathroom use, prescribed care, health supports, rest, relationships, and emergency help available. Ask the person through accessible communication whether the outcome and display reflect something useful. Immediate safety action never waits for graph completion.

Use sources within their role for Kiana

For Kiana, the BACB ethics hub and CASP public summary provide professional context. The BCBA Test Content Outline includes graphing, visual analysis, and data-based decisions as examination content. The WWC handbook page and Version 5.0 handbook address research review, so routine care should avoid borrowing a causal claim without suitable design.

For the transparent graph time scales question, Lobo and colleagues discuss single-case design and analysis, while Wolfe, Barton, and Meadan describe systematic visual-analysis protocols. McTiernan and colleagues show that linear and ratio scales can produce different visual impressions. Zonneveld and colleagues study graph-construction training. ASHA supports continuous access to AAC tools.

Close the graph review for Kiana

Review the x-axis decision log with Kiana and the responsible clinician. Record the display choice, source lineage, graph version, interpretation limits, decision, owner, next data requirement, and review date. Reopen the audit when the definition, measure, axis, condition, criterion, context, access, or software changes.

Before release, confirm every point maps to an observation date and session ID, axis labels name the unit, and gaps appear as designed. Check that the written interpretation uses the same time basis as the display and that a second panel is available when sequence and elapsed time answer different questions.

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