Technology & Digital Tools Flashcards
7 cards from real CHA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Technology & Digital Tools flashcards as text
A CHA examiner uses thin-layer chromatography (TLC) in conjunction with their handwriting analysis. What does TLC reveal?
Answer: The chemical components of ink, helping determine if different inks were used or to date an entry
TLC separates ink components by chemical properties, allowing comparison of ink formulas and potentially dating entries relative to known ink formula timelines.
When a CHA examiner creates a digital report using presentation software, what ethical obligation applies to any image enhancements shown?
Answer: All image processing steps must be disclosed and the original unaltered image must be available for comparison
Full disclosure of image processing methodology ensures transparency, reproducibility, and the opposing party's ability to challenge the process.
Dynamic handwriting analysis (online analysis) differs from static analysis (offline analysis) in that it:
Answer: Captures pen movement, velocity, pressure, and timing data in real time as writing is produced
Dynamic (online) analysis captures the temporal sequence and biometric dynamics of writing, providing authentication features unavailable from examining a completed static document.
A CHA encounters a questioned document where the ink appears uniform under white light but shows anomalies under infrared. The most likely explanation is:
Answer: Different inks with similar visible colors but different infrared absorption properties were used, suggesting alteration
Inks that match visually may have different chemical compositions that absorb or reflect infrared differently, revealing substitutions or additions not visible under white light.
What is the primary advantage of using a 3D surface profilometer in questioned document examination?
Answer: It creates a topographic map of pen pressure grooves and indentations with sub-micron precision
A surface profilometer quantifies the depth and shape of writing impressions with precision, providing objective data about writing pressure and instrument type.
Which consideration is most important when a CHA stores questioned document images on a cloud-based platform?
Answer: Verifying the platform complies with relevant privacy regulations and uses encryption to protect potentially sensitive legal evidence
Questioned documents are sensitive legal evidence and must be protected with encryption and regulatory-compliant storage to maintain chain of custody and client confidentiality.
A court asks a CHA to explain why the results of two different computerized handwriting analysis systems produced different similarity scores for the same pair of samples. The most accurate response is:
Answer: Different systems use different feature sets, algorithms, and training datasets, so scores are not directly comparable across platforms
Each system defines and weights handwriting features differently, making cross-platform score comparisons meaningless without understanding each system's underlying methodology.