Validity means the accuracy of an assessment to check whether it measures what it aims to measure or not. In other words, it is the extent to which the evidence backs the interpretations of test scores and the uses of the test. To ensure that the way we interpret the results of an assessment and use them is valid, we must consider combining all relevant evidence from various sources so that when coming up with consequences, they don't affect the students negatively. One thing that can enhance validity is flexibility in the tasks and conditions of an assessment, which permits the assessment to be appropriately formed in the learning context. For example, if an assessment plans to measure students’ knowledge about the 3D Geometric shapes but then measures concepts about 2D geometric shapes entirely, the assessment is not valid, and it may not be accurately measuring the chapter's objectives. Such errors as these can have a ruinous impact on the validity of the examination. But when it comes to improving the validity of using the assessment results for grading the students, one must consider several criteria.
Content representativeness and relevance
Any assessment to be considered valid relies highly on how it represents the learning goals that are expected from the students to achieve. It is crucial to ensure the objectives and goals are clearly defined; in other words, what is expected from the students must be written down to make it straightforward for them. Also, what the assessment measures must precisely match these goals. Furthermore, every task, question, and exercise in the assessment should mirror relevant and represent something noteworthy to know and learn that goes along with the thinking skills and content set by the school or state educational agency's curriculum.
The assessment procedure should emphasize what has been taught in the class. It must provide evidence of learning and measure some standards/goals/objectives to be valid. It should reflect specified curriculum elements that have been learned in an integrated way. The assessment procedure should not under-represent, over-represent, or exclude elements already taught and a lot of time has been spent on.
The content in the assessment must be essential and worth learning. The curriculum does not just define learning whereas by how it is assessed. When teachers create assessments, they must consider what the students need to learn based on the current thinking and what is worth knowing. For example, I might think teaching the students about floppy disks and including questions about them in my assessment is important but is that worth learning? Does it reflect what they are supposed to learn that could help them in the future? That's why teachers must stay up-to-date about such developments. The information present in the assessment demands learners to use various knowledge and skills that should be used in their life situations.
Thinking Processes and Skills Represented
Assessments should not only measure students' attainment of the content explained in the classroom but also should evaluate them on an adequately broad range of thinking skills and strategies. When designing an assessment to evaluate students' understanding of a particular unit or lesson, it is essential to have a wide range of thinking skills presented in the form of questions or problems, which could be done by using bloom's taxonomy. When using bloom's taxonomy, you can realize that assessments should cover information or knowledge that serves at the bottom of the pyramid (Knowledge, Understand, and Apply) but should also cover information or knowledge that fits at the top of the pyramid (Analyzing, Evaluating, and Creating). Learners should be capable of utilizing their knowledge in solving real-life situations further than the material included in the course, give their views and support them, and provide examples.
The tasks on the assessment instrument demand learners to utilize essential thinking skills, especially critical ones and processes. Any assessment should not only have one type of thinking skill because it won't be valid. For example, instead of asking the students to only state the characteristics of shapes, have them compare the shapes by using their attributes because it reflects their deep understanding or ask them to give real-life examples that show how they relate the learned information to real-life.
The students should use the types of thinking I expect them to use during the assessment. When I want to check students' ability to analyze, I must check if they used the analysis thinking skill or not in the evaluation. Another option is selecting students individually and calling them out to think aloud of the way they analyzed and explained the questions to check if they can do so. Moreover, the questions must not have hints to the right answer because they can assist learners in responding correctly even if they have not grasped the information. Furthermore, questions must be worded away from complex language and absolutes like "never" or "always; instead, use appropriate language for the learners because questions having complicated language may destroy what the question was planned to evaluate.
Teachers must give students enough time to display the thinking they are trying to assess. Every assessment procedure, whether a Quiz, mid-term exam, or final, should be created in a way that students can finish it in the available time. The time given for an examination is essential and impacts students' results. If you give a short period of time for a long exam, even the students who grasped the information included for the exam correctly may not accomplish their highest prospect. Hence, the information regarding their general interpretation will be incomplete, damaging the teachers' insight into what these learners comprehend and can do.
Consistency with Other Classroom Assessments
After you have taught a certain class, you have collected data about each student's performance, ability, achievements, and knowledge from observations or assessments of many appropriate types to assess their attainment. A student's results must be compatible with their performance pattern on any assessment done. Sometimes students may do very well on the exam or do very badly than what we as teachers predicted, which is a sign that we should figure out why.
The pattern of results in the class must be consistent with what is expected based on the other assessments done for students. When assessments give surprising results — for example, all students did poorly on an assessment or their answers are not compatible with what the teacher is looking for. In case all the students failed, it might reveal that the material was not taught sufficiently or the assessment was so poorly written, and that's why they were incapable of applying their understanding correctly.
The assessments shouldn't be too easy or too hard for students. For assessments to be valid, they must be fair. In other words, they should provide all learners an equal opportunity to demonstrate what they understand. Additionally, they should measure understanding associated with the subject's objectives. Some exams might be too easy for students so that the whole class' scores are close to each other, which confuses the teacher while interpreting the results and gives an incomplete picture of students' levels. Similarly, if the exam is too difficult, even the brilliant ones won't be able to demonstrate their knowledge which frustrates them.
Reliability and Objectivity
Reliability is how consistently an assessment estimates characteristics. For example, If a student retakes the exam, will they gain a matching result or a different one? The test is reliable if that student gets matching scores in the same exam after doing it twice. Inconsistencies that lower the validity of the assessment scores result from creating too short assessments or not using good scoring rubrics.
Objectivity is the extent to which two or more eligible evaluators will decide what quality rating to give a learner's performance.
For an assessment to be valid and reliable, the teacher must use a scoring guide to obtain quality ratings or scores from students' performance. Rubrics present a means to underestimate subjectivity, mainly when having complicated tasks. Rubrics must be stated thoroughly and unambiguously, which can be accomplished by creating new rubrics or modifying old ones. When adjusting scores, enhancing the dependability of rubrics is a must, which can be completed by showing the other graders how you are assigning grades and would ideally help them. As teachers, when composing a task, we must create a sample answer and a straightforward scoring guide. For example, if it is an essay question, do you want it to have examples? Supporting details? Do you want them to start with an impressive introduction? End with a summary? Designing a rubric will assist you in assuring the question is clearly described.
Economy, Efficiency, Practicality, Instructional Features
The assessment should not take a lot of time because the information presented in the assessment ought to be valuable and functional. Teachers must be knowledgeable about the strengths and limitations; thus, they can adequately analyze learners' answers. Taking a strange assessment method forms a threat to time and resources, resulting in suspicious marks from students' answers.
Sometimes the time needed to do an assessment is better spent directly teaching the students instead. For example, rather than doing an individual observation for each student, you can assign them as groups and check how they work with each other rather than consuming a lot of time on such a type of assessment. Assessments must be effortless, permitting you adequate time to design and have it, grade the students' performance, return grades, and provide feedback at a convenient time.
Multiple-Assessment Usage
Multiple measures of students' learning can give a more suitable method to evaluate their progress. Assessments must be created especially to improve understanding, not only to gather information for a report. All types of assessments should allow learners to display high levels of knowledge in a mixture of contexts. Using numerous sources of evidence about students' understanding, collected multiple times. For example, include formal and informal observations, exams that contain mc questions, essays, assignments, projects, lab work, portfolios, and presentations.
A list of questions must be answered the next time when you are designing a valid assessment:
Will my students be expected to answer this based on what I've instructed in class?
Do I have a clear purpose in my mind?
What type of assessment would be most suitable for the situation based on what I'm teaching, the goal of the instruction, and what I want to measure?
Is the test parallel to the information and work covered in a class if the goal of my assessment is to decide how well students have learned a particular topic?
Are the questions on vital points demanding understanding implications, applying information, and reorganizing data if the major goal of the test is to classify students in order of their achievement and check their deep understanding of the concepts?
Are the questions challenging students to do more than remember and recall facts?
Is the information mentioned in the assessment worth learning?
Have I developed scoring guidelines for the assessments that demonstrate plainly specified levels of performance?
Did I share and discuss the scoring guidelines with my students before they took the assessment to confirm that they understand the type of work anticipated at each performance level?
Is my assessment more reflective of real-world tasks?
Does my assessment provide evidence of my students' in-depth knowledge of a topic?
Can the assessment be finished in the allocated time?
Is the assessment fair, and all examples of abusive language and bias have been eliminated?
Do I use vocabulary suitable for my students?
Do the questions have complex language that might conquer what was intended to assess?
Assessment is among an educator's most critical educational means. When adequately designed and analyzed, assessments can assist educators in sufficiently comprehending what their pupils are understanding. They do more than just estimate learning. The information we assess, how we assess it, and the way we display the outcomes transmit a straightforward message to learners about what is worth learning. Most significantly, an assessment should provide the evidence it was suggested to give and measure the understanding, mastery, and skills the teacher acknowledges as important. Using an assessment as an element of the learning process rather than in a summative role at the end of a teaching segment guarantees that students comprehend the applicability of what they are learning and how that knowledge will be evaluated. It is essential to choose assessments that have been designed robustly relevant to and provide fair coverage of the content explained. Assessments should be reliable and valid for students' outcomes to be reasonable. Therefore, validity and reliability must be analyzed, documented, and taken into consideration for every assessment to measure the students' results correctly.
