Visual Analog Score
Visual Analog Score - Related Videos
01:06
Introduction to z Scores
0 Views •
2023
A z score (or standardized value) is measured in units of the standard deviation. It tells you how many standard deviations the value x is above (to the right of) or below (to the left of) the mean, μ. Values of x that are larger than the mean have positive z scores, and values of x that are smaller than the mean have negative z scores. If x equals the mean, then x has a zero z score. It is important to note that the mean of the z scores is zero, and the standard deviation is one. z scores help...
01:05
Introduction to z Scores
0 Views •
2024
A z score (or standardized value) is measured in units of the standard deviation. It indicates how many standard deviations the value x is above (to the right of) or below (to the left of) the mean, μ. Values of x that are larger than the mean have positive z scores, and values of x that are smaller than the mean have negative z scores. If x equals the mean, then x has a zero z score. It is important to note that the mean of the z scores is zero, and the standard deviation is one. z scores help...
01:17
z Scores and Area Under the Curve
0 Views •
2023
z scores are the standardized values obtained after converting a normal distribution into a standard normal distribution. A z score is measured in units of the standard deviation. The z score tells you how many standard deviations the value x is above (to the right of) or below (to the left of) the mean, μ. Values of x that are larger than the mean have positive z scores, and values of x that are smaller than the mean have negative z scores. If x equals the mean, then x has a z score of zero.
02:48
Labeling of Replicating HSV-1 Genomes with a Nucleoside Analog
0 Views •
2026
Source: Dembowski, J. A., Deluca, N. A. Purification of Viral DNA for the Identification of Associated Viral and Cellular Proteins. J. Vis. Exp. (2017)This video demonstrates the infection of stationary-phase mammalian cells with HSV-1 (Herpes Simplex Virus-1), followed by replication of the viral genome using host and viral replication machinery. A synthetic nucleoside analog is incorporated into newly synthesized viral DNA to label replicating genomes, which are subsequently isolated for...
09:38
The Ladder Rung Walking Task: A Scoring System and its Practical Application.
0 Views •
Cited by 305 •
2009
The ladder rung walking task is a new test to assess skilled walking and measure both forelimb and hindlimb placing, stepping, and inter-limb co-ordination.
FAQs
The patient places a mark at the point that best matches the experienced symptom intensity. Clinicians or researchers then measure the mark’s distance from the zero anchor, commonly in millimeters on a 0-to-100 scale. This preserves a direct relationship between the patient’s position and the recorded symptom value.
Endpoint descriptions establish the meaning of the scale’s boundaries. Terms such as “no pain” and “worst pain imaginable” help patients interpret what the lowest and highest positions represent before marking the line. Clear, consistent anchors support more comparable responses across visits, although the result still reflects an individual subjective experience.
Results may vary when patients interpret the scale or its endpoint wording differently, or when they do not apply the scale consistently between assessments. Because the measure depends on personal judgment, clinicians should present the same scale and instructions each time. Consistency improves the usefulness of comparisons without removing symptom subjectivity.
First, provide the patient with the line and its symptom anchors, such as “no pain” and “worst pain imaginable.” The patient marks the position representing current intensity. The clinician or study team measures the distance from the zero point, records the resulting value, and can repeat the process during later assessments.
A baseline score provides a reference for the patient’s initial symptom intensity. After treatment, clinicians can repeat the same assessment and compare the new value with the baseline and previous visits. This supports tracking symptom change over time and helps document outcomes using a consistent patient-reported measure.
Its rapid administration and simple marking procedure make it useful for bedside assessment, follow-up visits, and studies that compare symptom outcomes. The measure can capture changes in a patient’s reported experience across assessments. Interpretation remains strongest when the same scale, anchors, and approach are maintained throughout care or data collection.