What are the three main types of investigations?

Asked by: Prof. Adriana Stanton MD  |  Last update: March 24, 2026
Score: 4.3/5 (9 votes)

The three main types of scientific investigations are descriptive, comparative, and experimental, each serving a different purpose: descriptive ones observe and describe phenomena, comparative ones look at differences between groups or conditions, and experimental ones test cause-and-effect relationships by manipulating variables.

What are the three types of investigations?

The three main types of scientific investigations are Descriptive, Comparative, and Experimental, differing by their goals: to observe and describe (Descriptive), compare different conditions without direct manipulation (Comparative), or test cause-and-effect relationships by controlling variables (Experimental). Descriptive studies answer "what," comparative studies find relationships, and experimental studies determine "why" (causality).
 

What are different types of investigation?

Different Types of Investigation

  • Immediate review (within 3 days)
  • Internal investigation (within 3 months)
  • Independent Inquiry ('promptly')

What are the three tools of investigation?

The document discusses the three tools or "I's" of criminal investigation: INFORMATION, INTERVIEW/INTERROGATION, and INSTRUMENTATION.

What are the three main stages of scientific investigation?

The steps in the scientific method are:

  • Asking a question, usually driven by previous observations.
  • Form a hypothesis; a testable and falsifiable if-then statement that provides a possible answer to the question.
  • Test the hypothesis through experimentation and collect data.

3 Types of Investigations

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How many types of scientific investigations are there?

There are three main types of investigations: descriptive, comparative, and experimental. In this resource we will focus on descriptive and comparative. Much of science is conducted with investigations using observations that result in descriptive findings. This type of study is called a descriptive investigation.

What are the five steps of investigation?

Five Phase Investigation Process

  • Phase I: Preparation and Planning. ...
  • Phase II: Information Gathering and Problem Identification. ...
  • Phase III: Verification and Analysis. ...
  • Phase IV: Disbursement of Disciplinary and Corrective Action. ...
  • Phase V: Prevention and Education. ...
  • Summary. ...
  • Confidentiality. ...
  • Attorney/Client Privilege.

What are the three pillars of investigation?

However, Investigators can overcome these challenges to build a defensible investigation by building off timeliness, thoroughness, and comprehensive reporting—the three pillars for a defensible investigation.

What are some methods of investigation?

Traditional investigative techniques involve methods such as conducting interviews, gathering and analyzing evidence, and assessing reports and complaints to determine if further investigation is warranted.

What are the three components of an investigation?

PROCEDURES TO GUIDE CRIMINAL INVESTIGATIONS ARE ENUMERATED, WITH EMPHASIS ON GATHERING, ORGANIZING, AND EVALUATING SIGNIFICANT EVIDENCE.

What are the three phases of investigation?

The document outlines the phases of a criminal investigation which typically includes identifying the criminal, tracing and locating them, and gathering evidence to prove their guilt in court. It discusses that the three phases are not necessarily separate but often occur simultaneously.

What are the types of investigators?

Here are 10 types of detectives to consider:

  • Homicide detective. Homicide detectives investigate murders and apprehend the suspects accused of committing them. ...
  • Police detective. ...
  • Forensic detective. ...
  • Computer crime detective. ...
  • Narcotics detectives. ...
  • Cold case detectives. ...
  • Undercover detective. ...
  • Private detective.

What are the three purposes of investigation?

Purpose of investigation

seek to identify a suspect or suspects and take effective action to address their behaviour. secure and preserve evidence. establish what happened. obtain support and safeguarding for those involved who need it.

What are the different types of investigation?

  • Types Of Investigation. Scientists use different methods of investigation in different circumstances. ...
  • Identifying And Classifying. Identifying and classifying involves sorting objects or events into groups or categories. ...
  • Modelling. ...
  • Pattern Seeking. ...
  • Researching. ...
  • Fair Testing.

What are the three principles of investigation?

Confidentiality, informed consent and safety and welfare are essential principles for all investigations. These three are focused on basic and essential protection. Confidentiality must be maintained at all times.

What are the three basic types of experiments?

The three main types of scientific experiments are experimental, quasi-experimental, and observational (non-experimental). Experimental, or randomized control, is the highest level of scientific experimentation . As the name indicates, there is the greatest amount of control.

What are the three modes of investigation?

The three main types of scientific investigations are Descriptive, Comparative, and Experimental, differing by their goals: to observe and describe (Descriptive), compare different conditions without direct manipulation (Comparative), or test cause-and-effect relationships by controlling variables (Experimental). Descriptive studies answer "what," comparative studies find relationships, and experimental studies determine "why" (causality).
 

What are the basic techniques of investigation?

For countless years, criminal investigators have relied on six basic investigative techniques to solve crimes; i.e., (1) the development of informants, (2) use of undercover agents, (3) laboratory analysis of physical evidence, (4) physical and electronic surveillance, (5) interroga- tion, and (6) where permitted by ...

What are the 3 C's of criminal justice?

When defining the criminal justice system, the "Three C's" refer to Cops (Law Enforcement), Courts, and Corrections, representing the main interconnected components that enforce laws, adjudicate cases, and manage offenders. These three pillars work together to maintain order, ensure justice, and reduce crime within communities. 

What are the three tools in criminal investigation?

Tools ​To establish facts and develop evidence, a criminal investigator must use these tools-information, interview, interrogation, and instrumentation.

What are the different types of internal investigations?

There are several types of internal investigation. These include: undercover investigation, research investigation, financial investigation, electronic investigation, and corruption investigation. An undercover investigation involves an investigator within the organization.

What are the three rules of investigation?

The three rules you should apply to every incident investigation are: Don't Cause More Damage. Don't Destroy Evidence. Don't Make Up Your Mind Before You Start Investigating.

What are the 5 P's of investigation?

The five P's stand for “parts, position, paper, people and paradigms.” While the data in this case was collected by software, the method is sound and can be used to get great results without software.

What is the basic investigation process?

This document outlines the six phases of an investigation process: 1) Case Initiating which includes file preparation and identifying stakeholders, 2) Case Analysis involving on-site visits and data collection, 3) Inquiry Design such as developing questions, 4) Execution using tools like fishbone diagrams, 5) Results ...