October 5, 2006

Spirit and Power - A 10-Country Survey of Pentecostals

Survey Methodology

Results for the surveys are based on telephone interviews in the U.S. and face-to-face interviews in all other nations, conducted under the direction of Princeton Survey Research Associates International. The surveys in Guatemala, Nigeria, the Philippines and the U.S. are based on national samples. The survey in Chile is based on a national sample but excludes non-continental and remote areas, and the survey in Kenya is based on a national sample but excludes the largely Muslim North Eastern Province. In Brazil, South Africa and South Korea, the surveys are based on urban samples.

In India, the survey was conducted in three states believed to have among the highest percentage of Christians in India: Tamil Nadu, Kerala and Meghalaya. Within the three selected states, districts with the highest proportion of Christians were first selected, and then sampling points were randomly selected from these districts. This survey is NOT representative of the general population of India, nor is it representative of the population of the three Indian states in which it was conducted.

In each country, interviews were conducted among the general public and among oversamples of renewalists. The information below details the number of interviews conducted among the general public in each country, as well as the total number of interviews conducted among pentecostals and charismatics.

The country information also shows the margin of sampling error based on all interviews conducted among three groups – the general population, pentecostals and charismatics. For results based on the full sample in a given country, one can say with 95% confidence that the error attributable to sampling and other random effects is plus or minus the margin of error indicated for each group. In addition to sampling error, one should bear in mind that question wording and practical difficulties in conducting surveys can introduce error or bias into the findings of opinion polls.

Brazil
Survey Firm: Research International Brazil
Sample design: Probability sample of urban cities
Mode: Face-to-face with adults 18+
Language: Portuguese
Fieldwork dates: May 13 – May 30, 2006
Data processing: June 1 – July 25, 2006
Sample size: General public – 700; Pentecostals – 313; Charismatics – 329
Margin of Error: General public 4%, Pentecostals 6%, Charismatics 5%

Chile
Survey Firm: MORI Chile
Sample design: National probability sample, excluding non-continental and remote areas
Mode: Face-to-face with adults 18+
Language: Spanish
Fieldwork dates: May 12 – May 28, 2006
Data processing: June 28 – July 25, 2006
Sample size: General public – 600; Pentecostals – 276; Charismatics – 286
Margin of Error: General public 4%, Pentecostals 6%, Charismatics 6%

Guatemala
Survey Firm: MERCAPLAN
Sample design: National probability sample
Mode: Face-to-face with adults 18+
Language: Spanish
Fieldwork dates: May 5 – May 31, 2006
Data processing: June 26 – July 25, 2006
Sample size: General public – 1,005; Pentecostals – 410; Charismatics – 487
Margin of Error: General public 3%, Pentecostals 5%, Charismatics 4%

India
Survey Firm: TNS India
Sample design: Probability sample of disproportionately Christian districts of three
states–Tamil Nadu, Kerala and Meghalaya
Mode: Face-to-face with adults 18+
Languages: Hindi, Tamil and Malayalam
Fieldwork dates: May 16 – June 9, 2006
Data processing: July 5 – July 25, 2006
Sample size: General public – 726; Pentecostals – 409; Charismatics – 125
Margin of Error: General public 4%, Pentecostals 5%, Charismatics 9%

Kenya
Survey Firm: Research Path Associates
Sample design: National probability sample, excluding North Eastern Province
Mode: Face-to-face with adults 18+
Languages: English and Kiswahili
Fieldwork dates: May 17 – May 26, 2006
Data processing: June 29 – July 25, 2006
Sample size: General public – 655; Pentecostals – 403; Charismatics – 306
Margin of Error: General public 4%, Pentecostals 5%, Charismatics 6%

Nigeria
Survey Firm: Research International Nigeria
Sample design: National probability sample
Mode: Face-to-face with adults 18+
Languages: Yoruba, Igbo, Hausa and English
Fieldwork dates: May 15 – July 27, 2006
Data processing: July 31 – August 4, 2006
Sample size: General public – 650; Pentecostals – 483; Charismatics – 67
Margin of Error: General public 4%, Pentecostals 4%, Charismatics N/A (Due to the small
number of Nigerian charismatics surveyed, results for Nigerian
charismatics are not presented in this report.)

Philippines
Survey Firm: TNS Philippines
Sample design: National probability sample
Mode: Face-to-face with adults 18+
Languages: Tagalog, Cebuano and Ilonggo
Fieldwork dates: May 6 – May 29, 2006
Data processing: June 19 – July 25, 2006
Sample size: General public – 1,000; Pentecostals – 309; Charismatics – 433
Margin of Error: General public 3%, Pentecostals 6%, Charismatics 5%

South Africa
Survey Firm: Markinor
Sample design: National probability sample of urban areas
Mode: Face-to-face with adults 18+
Languages: Afrikaans, Pedi, Sotho, Tswana, Xhosa, Zulu and English
Fieldwork dates: May 11 – May 27, 2006
Data processing: June 26 – July 25, 2006
Sample size: General public – 800; Pentecostals – 259; Charismatics – 344
Margin of Error: General public 3%, Pentecostals 6%, Charismatics 5%

South Korea
Survey Firm: Gallup Korea
Sample design: National probability sample of urban cities
Mode: Face-to-face with adults 18+
Language: Korean
Fieldwork dates: May 8 – May 26, 2006
Data processing: June 18 – July 25, 2006
Sample size: General public – 600; Pentecostals – 131; Charismatics – 333
Margin of Error: General public 4%, Pentecostals 9%, Charismatics 5%

United States
Survey Firm: Princeton Survey Research Associates International
Sample design: National probability sample
Mode: Telephone
Languages: English and Spanish
Fieldwork dates: July 20 – September 7, 2006
Data processing: September 8 – September 12, 2006
Sample size: General public – 739; Pentecostals – 119; Charismatics – 421
Margin of Error: General public 4%, Pentecostals 9%, Charismatics 5%