Skip to main content

Sexual Orientation Identity Development Scale SOI


Scale name:  Sexual Orientation Identity Development Scale  (SOI)

Scale overview:

The Sexual Orientation Identity Development Scale measures three dimensions of sexual orientation: Affirmation, Exploration, Resolution. English and Spanish versions are available.

Authors:  Toomey, R. B., Anhalt, K., & Shramko, M.

Response Type4-point rating scale: 

1 = Does not describe me at all, 

2 = Describes me a little,

3 = Describes me well, 

4 = Describes me very well.


1 = No me describe en absolute,  

2 = Me escribe un poco,  

3 = Me describe bien,

4 = Me describe muy bien

Subscales: There are three subscales (alpha values in parentheses):

     Affirmation (Spearman-Brown .81)

     Exploration (Spearman-Brown .61)

     Resolution (alpha .67)


Sample items

  1. I have attended events that have helped me learn about my sexual orientation, such as gay-straight alliance meetings or events at a lesbian, gay, bisexual, and transgender (LGBT) community center.

  9. I have a clear sense of what my sexual orientation means to me.


  1.  He asistido a eventos que me han ayudado a aprender más acerca de mi orientación sexual. Por ejemplo, he asistido al club de estudiantes GSA (Gay-Straight Alliance/Alianza Gay-Heterosexual) en mi escuela ó a eventos en el centro comunitario LGBT.

  9.  Tengo un sentido claro de lo que significa mi orientación sexual para mí.


Reliability: See the alpha values next to each subscale above.


The authors used factor analysis to examine the structure of the scale.

“In terms of construct validity, we found that SOI resolution and affirmation were both positively associated with self-esteem and negatively correlated with internalized homonegativity. SOI exploration, however, was not associated with self-esteem or internalized homonegativity.” (Toomey et al., 2016, p. 499)

See the article below for more details.

Availability: The full set of items are available in English and Spanish with the four point ratings at the PsycTESTS reference– see below.


   Contact Publisher and Corresponding Author.”

            Publisher: © 2016 by Taylor & Francis


Toomey, R. B., Anhalt, K., & Shramko, M. (2016). Sexual Orientation Identity Development Scale [Database record]. Retrieved from PsycTESTS. doi:

Toomey, Russell B., Anhalt, Karla, & Shramko, Maura. (2016). An examination of the validity and reliability of a measure of sexual orientation identity exploration, resolution, and affirmation. Self and Identity, Vol 15(4), 488-504. doi:


Reference for using scales in research:

Buy Creating Surveys on






Reference for clinicians on understanding assessment

Buy Applied Statistics for Counselors






Resource Link:  A – Z Test Index


Links to Connections

Checkout My Website


See my Books





FOLLOW me on

   FACEBOOK   Geoff W. Sutton  


   TWITTER  @Geoff.W.Sutton




Read published articles:


  Academia   Geoff W Sutton   


  ResearchGate   Geoffrey W Sutton 






Popular posts from this blog

Personal Self-Concept Questionnaire (PSQ)

  The Personal Self-Concept Questionnaire  ( PSQ )   Overview The Personal Self-Concept Questionnaire (PSQ) measures self-concept based on ratings of 18 items, which are grouped into four categories: Self-fulfilment, autonomy, honesty, and emotional self-concept. Subscales : The PSQ has four subscales 1. Self-fulfilment (6 items) 2. Autonomy (4 items) 3. Honesty (3 items) 4. Emotional self-concept (5 items)  👉 [ Read more about Self-Concept and Self-Identity] The PSQ is a Likert-type scale with five response options ranging from totally disagree to totally agree. Reliability and Validity In the first study, coefficient alpha = .85 and in study two, alpha = .83. Data analysis supported a four-dimensional model (see the four categories above). Positive correlations with other self-concept measures were statistically significant. Other notes The authors estimated it took about 10 minutes to complete the PSQ. Their first study included people ages 12 to 36 ( n = 506). In the second s

Student Self-Efficacy

  Assessment name:  STUDENT SELF-EFFICACY SCALE * Note. This post has been updated to provide an available measure of student self-efficacy. ———- Scale overview:  The  student self-efficacy scale i s a 10-item measure of self-efficacy. It was developed using data from university nursing students in the United States. Authors: Melodie Rowbotham and Gerdamarie Schmitz Response Type:  A four-choice rating scale as follows: 1 = not at all true 2 = hardly true 3 = moderately true 4 = exactly true   Self-efficacy is the perception that a person can act in a way to achieve a desired goal.  Scale items There are 10 items. Examples: I am confident in my ability to learn, even if I am having a bad day. If I try hard enough, I can obtain the academic goals I desire.   Psychometric properties The authors reported that their sample scores ranged from 25 to 40 with a scale mean of 34.23 ( SD  = 3.80. Internal consistency was high at alpha = .84. The authors reported the results of a principal compon

Mathematics Self-Efficacy and Anxiety Questionnaire (MSEAQ)

  Scale name: Mathematics Self-Efficacy and Anxiety Questionnaire (MSEAQ) Scale overview: The Mathematics Self-Efficacy and Anxiety Questionnaire (MSEAQ) is a 29-item self-report measure of both mathematics self-efficacy and mathematics anxiety. Author: Diana Kathleen May Response Type: Items are rated on a 5-point Likert-type scale following a “no response” option: 1 = Never 2 = Seldom 3 = Sometimes 4 = Often 5 = usually Sample items 1. I feel confident enough to ask questions  in my mathematics class. 6. I worry that I will not be able to get a  good grade in my mathematics course.   Subscales and basic statistics for the MSEAQ       Self-Efficacy M = 44.11, SD = 10.78, alpha = .93       Anxiety M = 46.47, SD = 12.61, alpha = .93       Total Scale M = 90.58, SD = 22.78, alpha = .96 Reliability: See the Cronbach’s alpha levels reported above. Validity: There were significant positive correlations with similar measures. The results of a Fa