The tape timer affords study of downward motion only, so the direction of acceleration and the acceleration at the turning point cannot be addressed¶
Claim · All claims
Evidence · 1 study · qualitativer2·q1
Currency · newest study 2018 · not yet checked against its sources · not reviewed by a person · overdue for a recheck since 2021: tool and model accuracy changes quickly
Subclaims¶
Reading the evidence codes
q is the design tier, i the impact, n the sample, and the kind with its r
the rigour judged within that kind: what each code means.
This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.
q1 i? Because the cart pulls the tape through the tape timer, only downward motion can be recorded and turning-point phenomena are inaccessible. → Jonte Bernhard 2018
Evidence¶
Jonte Bernhard 2018¶
Jonte Bernhard. (2018). What matters for students' learning in the laboratory? Do not neglect the role of experimental equipment! Instructional Science. https://doi.org/10.1007/s11251-018-9469-x
q1 · i? · qualitative · r2
Affordance analysis of the tape timer lab (dots on a paper tape at 0.01 s intervals). The article states that "it is not possible to address the direction of acceleration by using this technology to record the cart's motion after pushing it up the inclined plane, or the magnitude of the acceleration at the turning point."
"Since the tape is pulled by the cart through the tape timer, only downward motion can be studied. Upward motion would buckle the tape."
Discussion¶
Related Claims¶
- Students' courses of action differed by instrumentation: photogate and tape-timer groups centred on numbers and dots with motion concepts rare, while probeware groups centred on motion concepts — related
- Photogates do not determine the sign of velocity, cannot show zero velocity with non-zero acceleration at the turning point, and afford the Δv/Δx rather than the Δv/Δt definition of acceleration — related
- Probeware affords measurement of acceleration at the cart's highest point after an upward push, permitting the fallacy that acceleration is zero there to be addressed — related
- What is possible for students to perceive or discern in a laboratory depends on the measurement technology used, even when the object of learning is the same — a broader claim this one bears on
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
tape-timer-one-direction-limit |
title |
The tape timer affords study of downward motion only, so the direction of acceleration and the acceleration at the turning point cannot be addressed |
description |
The tape timer affords study of downward motion only, so the direction of acceleration and the acceleration at the turning point cannot be addressed |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2018 |
recheck_by |
2021 |
generated |
by process:wiki-ingest on 2026-10-18 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — jonte-bernhard-2018 |
Frontmatter is the page's machine-readable record — see the Schema & Guide.